| Message ID | 20240419-topic-sm8x50-i2c-v1-1-67651e27f23a@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | i2c: Add support for Qualcomm Generic Interface (GENI) I2C controller | expand |
Hi Neil, On 18/04/2024 23:47, Neil Armstrong wrote: > Add Support for the Qualcomm Generic Interface (GENI) I2C interface > found on newer Qualcomm SoCs. \o/ > > The Generic Interface (GENI) is a firmware based Qualcomm Universal > Peripherals (QUP) Serial Engine (SE) Wrapper which can support multiple > bus protocols depending on the firmware type loaded at early boot time > based on system configuration. > > It also supports the "I2C Master Hub" which is a single function Wrapper > that only FIFO mode I2C. > > It replaces the fixed-function QUP Wrapper found on older SoCs. > > The geni-se.h containing the generic GENI Serial Engine registers defines > is imported from Linux. > > Only FIFO mode is implemented, nor SE DMA nor GPI DMA is implemented. nit: "neither SE DMA nor GPI DMA are implemented" A few minor things below, but otherwise LGTM! > > Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> > --- > drivers/i2c/Kconfig | 10 + > drivers/i2c/Makefile | 1 + > drivers/i2c/geni_i2c.c | 576 +++++++++++++++++++++++++++++++++++++++++++++ > include/soc/qcom/geni-se.h | 265 +++++++++++++++++++++ > 4 files changed, 852 insertions(+) > [...] > diff --git a/drivers/i2c/geni_i2c.c b/drivers/i2c/geni_i2c.c > new file mode 100644 > index 00000000000..8c3ed3bef89 > --- /dev/null > +++ b/drivers/i2c/geni_i2c.c > @@ -0,0 +1,576 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. > + * Copyright (c) 2024, Linaro Limited > + * Author: Neil Armstrong <neil.armstrong@linaro.org> > + * > + * Based on Linux driver: drivers/i2c/busses/i2c-qcom-geni.c > + */ > + [...] > +static int geni_i2c_fifo_tx_fill(struct geni_i2c_priv *geni, struct i2c_msg *msg) > +{ > + ulong start = get_timer(0); > + ulong cur_xfer = 0; > + int i; > + > + while (get_timer(start) < I2C_TIMEOUT_MS) { > + u32 status = readl(geni->base + SE_GENI_M_IRQ_STATUS); > + > + if (status & (M_CMD_ABORT_EN | > + M_CMD_OVERRUN_EN | > + M_ILLEGAL_CMD_EN | > + M_CMD_FAILURE_EN | > + M_GP_IRQ_1_EN | > + M_GP_IRQ_3_EN | > + M_GP_IRQ_4_EN)) { > + debug("%s:%d cmd err\n", __func__, __LINE__); How likely are we to hit this? Would it make sense to promote it to a pr_warn()? Please drop the __LINE__ and (if it makes sense to?) print the value of status. > + writel(status, geni->base + SE_GENI_M_IRQ_CLEAR); > + writel(0, geni->base + SE_GENI_TX_WATERMARK_REG); > + return -EREMOTEIO; > + } > + > + if ((status & M_TX_FIFO_WATERMARK_EN) == 0) { > + udelay(1); > + goto skip_fill; > + } > + > + for (i = 0; i < geni->tx_wm; i++) { > + u32 temp, tx = 0; > + unsigned int p = 0; > + > + while (cur_xfer < msg->len && p < sizeof(tx)) { > + temp = msg->buf[cur_xfer++]; > + tx |= temp << (p * 8); > + p++; > + } > + > + writel(tx, geni->base + SE_GENI_TX_FIFOn); > + > + if (cur_xfer == msg->len) { > + writel(0, geni->base + SE_GENI_TX_WATERMARK_REG); > + break; > + } > + } > + > +skip_fill: > + writel(status, geni->base + SE_GENI_M_IRQ_CLEAR); > + > + if (status & M_CMD_DONE_EN) > + return 0; > + } > + > + return -ETIMEDOUT; > +} > + > +static int geni_i2c_fifo_rx_drain(struct geni_i2c_priv *geni, struct i2c_msg *msg) > +{ > + ulong start = get_timer(0); > + ulong cur_xfer = 0; > + int i; > + > + while (get_timer(start) < I2C_TIMEOUT_MS) { > + u32 status = readl(geni->base + SE_GENI_M_IRQ_STATUS); > + u32 rxstatus = readl(geni->base + SE_GENI_RX_FIFO_STATUS); > + u32 rxcnt = rxstatus & RX_FIFO_WC_MSK; > + > + if (status & (M_CMD_ABORT_EN | > + M_CMD_FAILURE_EN | > + M_CMD_OVERRUN_EN | > + M_ILLEGAL_CMD_EN | > + M_GP_IRQ_1_EN | > + M_GP_IRQ_3_EN | > + M_GP_IRQ_4_EN)) { > + debug("%s:%d cmd err\n", __func__, __LINE__); Ditto > + writel(status, geni->base + SE_GENI_M_IRQ_CLEAR); > + return -EIO; > + } > + > + if ((status & (M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN)) == 0) { > + udelay(1); > + goto skip_drain; > + } > + > + for (i = 0; cur_xfer < msg->len && i < rxcnt; i++) { > + u32 rx = readl(geni->base + SE_GENI_RX_FIFOn); > + unsigned int p = 0; > + > + while (cur_xfer < msg->len && p < sizeof(rx)) { > + msg->buf[cur_xfer++] = rx & 0xff; > + rx >>= 8; > + p++; > + } > + } > + > +skip_drain: > + writel(status, geni->base + SE_GENI_M_IRQ_CLEAR); > + > + if (status & M_CMD_DONE_EN) > + return 0; > + } > + > + return -ETIMEDOUT; > +} > + > +static int geni_i2c_xfer_tx(struct geni_i2c_priv *geni, struct i2c_msg *msg, u32 params) > +{ > + writel(msg->len, geni->base + SE_I2C_TX_TRANS_LEN); > + geni_i2c_setup_m_cmd(geni, I2C_WRITE, params); > + writel(1, geni->base + SE_GENI_TX_WATERMARK_REG); > + > + return geni_i2c_fifo_tx_fill(geni, msg); > +} > + > +static int geni_i2c_xfer_rx(struct geni_i2c_priv *geni, struct i2c_msg *msg, u32 params) > +{ > + writel(msg->len, geni->base + SE_I2C_RX_TRANS_LEN); > + geni_i2c_setup_m_cmd(geni, I2C_READ, params); > + > + return geni_i2c_fifo_rx_drain(geni, msg); > +} > + > +static int geni_i2c_xfer(struct udevice *bus, struct i2c_msg msgs[], int num) > +{ > + struct geni_i2c_priv *geni = dev_get_priv(bus); > + int i, ret; > + > + qcom_geni_i2c_conf(geni); > + > + for (i = 0; i < num; i++) { > + struct i2c_msg *msg = &msgs[i]; > + u32 m_param = i < (num - 1) ? STOP_STRETCH : 0; > + > + m_param |= ((msg->addr << SLV_ADDR_SHFT) & SLV_ADDR_MSK); > + > + if (msg->flags & I2C_M_RD) > + ret = geni_i2c_xfer_rx(geni, msg, m_param); > + else > + ret = geni_i2c_xfer_tx(geni, msg, m_param); > + > + if (ret) > + break; > + } > + > + if (ret) { > + if (ret == -ETIMEDOUT) { > + u32 status; > + > + writel(M_GENI_CMD_ABORT, geni->base + SE_GENI_M_CMD_CTRL_REG); > + > + /* Wait until Abort has finished */ > + do { > + status = readl(geni->base + SE_GENI_M_IRQ_STATUS); > + } while ((status & M_CMD_ABORT_EN) == 0); > + > + writel(status, geni->base + SE_GENI_M_IRQ_STATUS); > + } > + > + return ret; > + } > + > + return 0; > +} > + > +static int geni_i2c_enable_clocks(struct udevice *dev, struct geni_i2c_priv *geni) > +{ > + int ret; > + > + if (geni->is_master_hub) { > + ret = clk_enable(&geni->core); > + if (ret) { > + dev_err(dev, "clk_enable core failed %d\n", ret); > + return ret; > + } > + } > + > + ret = clk_enable(&geni->se); > + if (ret) { > + dev_err(dev, "clk_enable se failed %d\n", ret); > + return ret; > + } > + > + return 0; > +} > + > +static int geni_i2c_disable_clocks(struct udevice *dev, struct geni_i2c_priv *geni) > +{ > + int ret; > + > + if (geni->is_master_hub) { > + ret = clk_disable(&geni->core); > + if (ret) { > + dev_err(dev, "clk_enable core failed %d\n", ret); > + return ret; > + } > + } > + > + ret = clk_disable(&geni->se); > + if (ret) { > + dev_err(dev, "clk_enable se failed %d\n", ret); > + return ret; > + } > + > + return 0; > +} > + > +#define NUM_PACKING_VECTORS 4 > +#define PACKING_START_SHIFT 5 > +#define PACKING_DIR_SHIFT 4 > +#define PACKING_LEN_SHIFT 1 > +#define PACKING_STOP_BIT BIT(0) > +#define PACKING_VECTOR_SHIFT 10 > +void geni_i2c_config_packing(struct geni_i2c_priv *geni, int bpw, int pack_words, > + bool msb_to_lsb, bool tx_cfg, bool rx_cfg) > +{ > + u32 cfg0, cfg1, cfg[NUM_PACKING_VECTORS] = {0}; > + int len; > + int temp_bpw = bpw; > + int idx_start = msb_to_lsb ? bpw - 1 : 0; > + int idx = idx_start; > + int idx_delta = msb_to_lsb ? -BITS_PER_BYTE : BITS_PER_BYTE; > + int ceil_bpw = ALIGN(bpw, BITS_PER_BYTE); > + int iter = (ceil_bpw * pack_words) / BITS_PER_BYTE; > + int i; > + > + if (iter <= 0 || iter > NUM_PACKING_VECTORS) > + return; > + > + for (i = 0; i < iter; i++) { > + len = min_t(int, temp_bpw, BITS_PER_BYTE) - 1; > + cfg[i] = idx << PACKING_START_SHIFT; > + cfg[i] |= msb_to_lsb << PACKING_DIR_SHIFT; > + cfg[i] |= len << PACKING_LEN_SHIFT; > + > + if (temp_bpw <= BITS_PER_BYTE) { > + idx = ((i + 1) * BITS_PER_BYTE) + idx_start; > + temp_bpw = bpw; > + } else { > + idx = idx + idx_delta; > + temp_bpw = temp_bpw - BITS_PER_BYTE; > + } > + } > + cfg[iter - 1] |= PACKING_STOP_BIT; > + cfg0 = cfg[0] | (cfg[1] << PACKING_VECTOR_SHIFT); > + cfg1 = cfg[2] | (cfg[3] << PACKING_VECTOR_SHIFT); > + > + if (tx_cfg) { > + writel(cfg0, geni->base + SE_GENI_TX_PACKING_CFG0); > + writel(cfg1, geni->base + SE_GENI_TX_PACKING_CFG1); > + } > + if (rx_cfg) { > + writel(cfg0, geni->base + SE_GENI_RX_PACKING_CFG0); > + writel(cfg1, geni->base + SE_GENI_RX_PACKING_CFG1); > + } > + > + /* > + * Number of protocol words in each FIFO entry > + * 0 - 4x8, four words in each entry, max word size of 8 bits > + * 1 - 2x16, two words in each entry, max word size of 16 bits > + * 2 - 1x32, one word in each entry, max word size of 32 bits > + * 3 - undefined > + */ > + if (pack_words || bpw == 32) > + writel(bpw / 16, geni->base + SE_GENI_BYTE_GRAN); > +} > + > +static void geni_i2c_init(struct geni_i2c_priv *geni, unsigned int tx_depth) > +{ > + u32 val; > + > + writel(0, geni->base + SE_GSI_EVENT_EN); > + writel(0xffffffff, geni->base + SE_GENI_M_IRQ_CLEAR); > + writel(0xffffffff, geni->base + SE_GENI_S_IRQ_CLEAR); > + writel(0xffffffff, geni->base + SE_IRQ_EN); > + > + val = readl(geni->base + GENI_CGC_CTRL); > + val |= DEFAULT_CGC_EN; > + writel(val, geni->base + GENI_CGC_CTRL); > + > + writel(DEFAULT_IO_OUTPUT_CTRL_MSK, geni->base + GENI_OUTPUT_CTRL); > + writel(FORCE_DEFAULT, geni->base + GENI_FORCE_DEFAULT_REG); > + > + val = readl(geni->base + SE_IRQ_EN); > + val |= GENI_M_IRQ_EN | GENI_S_IRQ_EN; > + writel(val, geni->base + SE_IRQ_EN); > + > + val = readl(geni->base + SE_GENI_DMA_MODE_EN); > + val &= ~GENI_DMA_MODE_EN; > + writel(val, geni->base + SE_GENI_DMA_MODE_EN); > + > + writel(0, geni->base + SE_GSI_EVENT_EN); > + > + writel(tx_depth - 1, geni->base + SE_GENI_RX_WATERMARK_REG); > + writel(tx_depth, geni->base + SE_GENI_RX_RFR_WATERMARK_REG); > + > + val = readl(geni->base + SE_GENI_M_IRQ_EN); > + val |= M_COMMON_GENI_M_IRQ_EN; > + val |= M_CMD_DONE_EN | M_TX_FIFO_WATERMARK_EN; > + val |= M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN; > + writel(val, geni->base + SE_GENI_M_IRQ_EN); > + > + val = readl(geni->base + SE_GENI_S_IRQ_EN); > + val |= S_COMMON_GENI_S_IRQ_EN; > + writel(val, geni->base + SE_GENI_S_IRQ_EN); > +} > + > +static u32 geni_i2c_get_tx_fifo_depth(struct geni_i2c_priv *geni) > +{ > + u32 val, hw_version, hw_major, hw_minor, tx_fifo_depth_mask; > + > + hw_version = readl(geni->wrapper + QUP_HW_VER_REG); > + hw_major = GENI_SE_VERSION_MAJOR(hw_version); > + hw_minor = GENI_SE_VERSION_MINOR(hw_version); > + > + if ((hw_major == 3 && hw_minor >= 10) || hw_major > 3) > + tx_fifo_depth_mask = TX_FIFO_DEPTH_MSK_256_BYTES; > + else > + tx_fifo_depth_mask = TX_FIFO_DEPTH_MSK; > + > + val = readl(geni->base + SE_HW_PARAM_0); > + > + return (val & tx_fifo_depth_mask) >> TX_FIFO_DEPTH_SHFT; > +} > + > +static int geni_i2c_probe(struct udevice *dev) > +{ > + ofnode parent_node = ofnode_get_parent(dev_ofnode(dev)); > + struct geni_i2c_priv *geni = dev_get_priv(dev); > + u32 proto, tx_depth, fifo_disable; > + int ret; > + > + geni->is_master_hub = dev_get_driver_data(dev) & GENI_I2C_IS_MASTER_HUB; > + > + geni->wrapper = ofnode_get_addr(parent_node); > + if (geni->wrapper == FDT_ADDR_T_NONE) > + return -EINVAL; > + > + geni->base = (phys_addr_t)dev_read_addr_ptr(dev); > + if (!geni->base) > + return -EINVAL; > + > + if (geni->is_master_hub) { > + ret = clk_get_by_name(dev, "core", &geni->core); > + if (ret) { > + pr_err("clk_get_by_name(core) failed: %d\n", ret); In other places you used dev_err(), but here it's pr_err() (even though dev is available), and below it's pr_err() with __func__ as the prefix. Please make these consistent. > + return ret; > + } > + } > + > + ret = clk_get_by_name(dev, "se", &geni->se); > + if (ret) { > + pr_err("clk_get_by_name(iface) failed: %d\n", ret); > + return ret; > + } > + > + geni_i2c_enable_clocks(dev, geni); > + > + proto = readl(geni->base + GENI_FW_REVISION_RO); > + proto &= FW_REV_PROTOCOL_MSK; > + proto >>= FW_REV_PROTOCOL_SHFT; > + > + if (proto != GENI_SE_I2C) { > + pr_err("%s: Invalid proto %d\n", __func__, proto); > + geni_i2c_disable_clocks(dev, geni); > + return -ENXIO; > + } > + > + fifo_disable = readl(geni->base + GENI_IF_DISABLE_RO) & FIFO_IF_DISABLE; > + if (fifo_disable) { > + geni_i2c_disable_clocks(dev, geni); > + pr_err("%s: FIFO mode disabled, DMA mode unsupported\n", __func__); > + return -ENXIO; > + } > + > + if (!geni->is_master_hub) { > + tx_depth = geni_i2c_get_tx_fifo_depth(geni); > + if (!tx_depth) { > + geni_i2c_disable_clocks(dev, geni); > + pr_err("%s: Invalid TX FIFO depth\n", __func__); > + return -ENXIO; > + } > + } else { > + tx_depth = 16; > + } > + geni->tx_wm = tx_depth - 1; > + > + geni_i2c_init(geni, tx_depth); > + geni_i2c_config_packing(geni, BITS_PER_BYTE, > + PACKING_BYTES_PW, true, true, true); > + > + /* Setup for standard rate */ > + return geni_i2c_clk_map_idx(geni, I2C_SPEED_STANDARD_RATE); > +} > + > +static int geni_i2c_set_bus_speed(struct udevice *dev, unsigned int clk_freq) > +{ > + struct geni_i2c_priv *geni = dev_get_priv(dev); > + > + return geni_i2c_clk_map_idx(geni, clk_freq); > +} > + > +static const struct dm_i2c_ops geni_i2c_ops = { > + .xfer = geni_i2c_xfer, > + .set_bus_speed = geni_i2c_set_bus_speed, > +}; > + > +static const struct udevice_id geni_i2c_ids[] = { > + { .compatible = "qcom,geni-i2c" }, > + { .compatible = "qcom,geni-i2c-master-hub", .data = GENI_I2C_IS_MASTER_HUB}, > + {} > +}; > + > +U_BOOT_DRIVER(i2c_geni) = { > + .name = "i2c_geni", > + .id = UCLASS_I2C, > + .of_match = geni_i2c_ids, > + .probe = geni_i2c_probe, > + .priv_auto = sizeof(struct geni_i2c_priv), > + .ops = &geni_i2c_ops, > +}; > + > +static const struct udevice_id geni_i2c_master_hub_ids[] = { > + { .compatible = "qcom,geni-se-i2c-master-hub" }, > + { } > +}; > + > +U_BOOT_DRIVER(geni_i2c_master_hub) = { > + .name = "geni-se-master-hub", > + .id = UCLASS_NOP, > + .of_match = geni_i2c_master_hub_ids, > + .bind = dm_scan_fdt_dev, > + .flags = DM_FLAG_PRE_RELOC | DM_FLAG_DEFAULT_PD_CTRL_OFF, > +}; > diff --git a/include/soc/qcom/geni-se.h b/include/soc/qcom/geni-se.h > new file mode 100644 > index 00000000000..698a9256d26 > --- /dev/null > +++ b/include/soc/qcom/geni-se.h > @@ -0,0 +1,265 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. > + */ > + > +#ifndef _QCOM_GENI_SE > +#define _QCOM_GENI_SE > + > +/* Protocols supported by GENI Serial Engines */ > +enum geni_se_protocol_type { > + GENI_SE_NONE, > + GENI_SE_SPI, > + GENI_SE_UART, > + GENI_SE_I2C, > + GENI_SE_I3C, > + GENI_SE_SPI_SLAVE, > +}; > + > +#define QUP_HW_VER_REG 0x4 > + > +/* Common SE registers */ > +#define GENI_INIT_CFG_REVISION 0x0 > +#define GENI_S_INIT_CFG_REVISION 0x4 > +#define GENI_FORCE_DEFAULT_REG 0x20 > +#define GENI_OUTPUT_CTRL 0x24 > +#define GENI_CGC_CTRL 0x28 > +#define SE_GENI_STATUS 0x40 > +#define GENI_SER_M_CLK_CFG 0x48 > +#define GENI_SER_S_CLK_CFG 0x4c > +#define GENI_IF_DISABLE_RO 0x64 > +#define GENI_FW_REVISION_RO 0x68 > +#define SE_GENI_CLK_SEL 0x7c > +#define SE_GENI_CFG_SEQ_START 0x84 > +#define SE_GENI_BYTE_GRAN 0x254 > +#define SE_GENI_DMA_MODE_EN 0x258 > +#define SE_GENI_TX_PACKING_CFG0 0x260 > +#define SE_GENI_TX_PACKING_CFG1 0x264 > +#define SE_GENI_RX_PACKING_CFG0 0x284 > +#define SE_GENI_RX_PACKING_CFG1 0x288 > +#define SE_GENI_M_CMD0 0x600 > +#define SE_GENI_M_CMD_CTRL_REG 0x604 > +#define SE_GENI_M_IRQ_STATUS 0x610 > +#define SE_GENI_M_IRQ_EN 0x614 > +#define SE_GENI_M_IRQ_CLEAR 0x618 > +#define SE_GENI_S_CMD0 0x630 > +#define SE_GENI_S_CMD_CTRL_REG 0x634 > +#define SE_GENI_S_IRQ_STATUS 0x640 > +#define SE_GENI_S_IRQ_EN 0x644 > +#define SE_GENI_S_IRQ_CLEAR 0x648 > +#define SE_GENI_TX_FIFOn 0x700 > +#define SE_GENI_RX_FIFOn 0x780 > +#define SE_GENI_TX_FIFO_STATUS 0x800 > +#define SE_GENI_RX_FIFO_STATUS 0x804 > +#define SE_GENI_TX_WATERMARK_REG 0x80c > +#define SE_GENI_RX_WATERMARK_REG 0x810 > +#define SE_GENI_RX_RFR_WATERMARK_REG 0x814 > +#define SE_GENI_IOS 0x908 > +#define SE_DMA_TX_IRQ_STAT 0xc40 > +#define SE_DMA_TX_IRQ_CLR 0xc44 > +#define SE_DMA_TX_FSM_RST 0xc58 > +#define SE_DMA_RX_IRQ_STAT 0xd40 > +#define SE_DMA_RX_IRQ_CLR 0xd44 > +#define SE_DMA_RX_LEN_IN 0xd54 > +#define SE_DMA_RX_FSM_RST 0xd58 > +#define SE_GSI_EVENT_EN 0xe18 > +#define SE_IRQ_EN 0xe1c > +#define SE_HW_PARAM_0 0xe24 > +#define SE_HW_PARAM_1 0xe28 > + > +/* GENI_FORCE_DEFAULT_REG fields */ > +#define FORCE_DEFAULT BIT(0) > + > +/* GENI_OUTPUT_CTRL fields */ > +#define GENI_IO_MUX_0_EN BIT(0) > +#define DEFAULT_IO_OUTPUT_CTRL_MSK GENMASK(6, 0) > + > +/* GENI_CGC_CTRL fields */ > +#define CFG_AHB_CLK_CGC_ON BIT(0) > +#define CFG_AHB_WR_ACLK_CGC_ON BIT(1) > +#define DATA_AHB_CLK_CGC_ON BIT(2) > +#define SCLK_CGC_ON BIT(3) > +#define TX_CLK_CGC_ON BIT(4) > +#define RX_CLK_CGC_ON BIT(5) > +#define EXT_CLK_CGC_ON BIT(6) > +#define PROG_RAM_HCLK_OFF BIT(8) > +#define PROG_RAM_SCLK_OFF BIT(9) > +#define DEFAULT_CGC_EN GENMASK(6, 0) > + > +/* GENI_STATUS fields */ > +#define M_GENI_CMD_ACTIVE BIT(0) > +#define S_GENI_CMD_ACTIVE BIT(12) > + > +/* GENI_SER_M_CLK_CFG/GENI_SER_S_CLK_CFG */ > +#define SER_CLK_EN BIT(0) > +#define CLK_DIV_MSK GENMASK(15, 4) > +#define CLK_DIV_SHFT 4 > + > +/* GENI_IF_DISABLE_RO fields */ > +#define FIFO_IF_DISABLE (BIT(0)) > + > +/* GENI_FW_REVISION_RO fields */ > +#define FW_REV_PROTOCOL_MSK GENMASK(15, 8) > +#define FW_REV_PROTOCOL_SHFT 8 > + > +/* GENI_CLK_SEL fields */ > +#define CLK_SEL_MSK GENMASK(2, 0) > + > +/* SE_GENI_CFG_SEQ_START fields */ > +#define START_TRIGGER BIT(0) > + > +/* SE_IRQ_EN fields */ > +#define DMA_RX_IRQ_EN BIT(0) > +#define DMA_TX_IRQ_EN BIT(1) > +#define GENI_M_IRQ_EN BIT(2) > +#define GENI_S_IRQ_EN BIT(3) > + > +/* SE_GENI_DMA_MODE_EN */ > +#define GENI_DMA_MODE_EN BIT(0) > + > +/* GENI_M_CMD0 fields */ > +#define M_OPCODE_MSK GENMASK(31, 27) > +#define M_OPCODE_SHFT 27 > +#define M_PARAMS_MSK GENMASK(26, 0) > + > +/* GENI_M_CMD_CTRL_REG */ > +#define M_GENI_CMD_CANCEL BIT(2) > +#define M_GENI_CMD_ABORT BIT(1) > +#define M_GENI_DISABLE BIT(0) > + > +/* GENI_S_CMD0 fields */ > +#define S_OPCODE_MSK GENMASK(31, 27) > +#define S_OPCODE_SHFT 27 > +#define S_PARAMS_MSK GENMASK(26, 0) > + > +/* GENI_S_CMD_CTRL_REG */ > +#define S_GENI_CMD_CANCEL BIT(2) > +#define S_GENI_CMD_ABORT BIT(1) > +#define S_GENI_DISABLE BIT(0) > + > +/* GENI_M_IRQ_EN fields */ > +#define M_CMD_DONE_EN BIT(0) > +#define M_CMD_OVERRUN_EN BIT(1) > +#define M_ILLEGAL_CMD_EN BIT(2) > +#define M_CMD_FAILURE_EN BIT(3) > +#define M_CMD_CANCEL_EN BIT(4) > +#define M_CMD_ABORT_EN BIT(5) > +#define M_TIMESTAMP_EN BIT(6) > +#define M_RX_IRQ_EN BIT(7) > +#define M_GP_SYNC_IRQ_0_EN BIT(8) > +#define M_GP_IRQ_0_EN BIT(9) > +#define M_GP_IRQ_1_EN BIT(10) > +#define M_GP_IRQ_2_EN BIT(11) > +#define M_GP_IRQ_3_EN BIT(12) > +#define M_GP_IRQ_4_EN BIT(13) > +#define M_GP_IRQ_5_EN BIT(14) > +#define M_TX_FIFO_NOT_EMPTY_EN BIT(21) > +#define M_IO_DATA_DEASSERT_EN BIT(22) > +#define M_IO_DATA_ASSERT_EN BIT(23) > +#define M_RX_FIFO_RD_ERR_EN BIT(24) > +#define M_RX_FIFO_WR_ERR_EN BIT(25) > +#define M_RX_FIFO_WATERMARK_EN BIT(26) > +#define M_RX_FIFO_LAST_EN BIT(27) > +#define M_TX_FIFO_RD_ERR_EN BIT(28) > +#define M_TX_FIFO_WR_ERR_EN BIT(29) > +#define M_TX_FIFO_WATERMARK_EN BIT(30) > +#define M_SEC_IRQ_EN BIT(31) > +#define M_COMMON_GENI_M_IRQ_EN (GENMASK(6, 1) | \ > + M_IO_DATA_DEASSERT_EN | \ > + M_IO_DATA_ASSERT_EN | M_RX_FIFO_RD_ERR_EN | \ > + M_RX_FIFO_WR_ERR_EN | M_TX_FIFO_RD_ERR_EN | \ > + M_TX_FIFO_WR_ERR_EN) > + > +/* GENI_S_IRQ_EN fields */ > +#define S_CMD_DONE_EN BIT(0) > +#define S_CMD_OVERRUN_EN BIT(1) > +#define S_ILLEGAL_CMD_EN BIT(2) > +#define S_CMD_FAILURE_EN BIT(3) > +#define S_CMD_CANCEL_EN BIT(4) > +#define S_CMD_ABORT_EN BIT(5) > +#define S_GP_SYNC_IRQ_0_EN BIT(8) > +#define S_GP_IRQ_0_EN BIT(9) > +#define S_GP_IRQ_1_EN BIT(10) > +#define S_GP_IRQ_2_EN BIT(11) > +#define S_GP_IRQ_3_EN BIT(12) > +#define S_GP_IRQ_4_EN BIT(13) > +#define S_GP_IRQ_5_EN BIT(14) > +#define S_IO_DATA_DEASSERT_EN BIT(22) > +#define S_IO_DATA_ASSERT_EN BIT(23) > +#define S_RX_FIFO_RD_ERR_EN BIT(24) > +#define S_RX_FIFO_WR_ERR_EN BIT(25) > +#define S_RX_FIFO_WATERMARK_EN BIT(26) > +#define S_RX_FIFO_LAST_EN BIT(27) > +#define S_COMMON_GENI_S_IRQ_EN (GENMASK(5, 1) | GENMASK(13, 9) | \ > + S_RX_FIFO_RD_ERR_EN | S_RX_FIFO_WR_ERR_EN) > + > +/* GENI_/TX/RX/RX_RFR/_WATERMARK_REG fields */ > +#define WATERMARK_MSK GENMASK(5, 0) > + > +/* GENI_TX_FIFO_STATUS fields */ > +#define TX_FIFO_WC GENMASK(27, 0) > + > +/* GENI_RX_FIFO_STATUS fields */ > +#define RX_LAST BIT(31) > +#define RX_LAST_BYTE_VALID_MSK GENMASK(30, 28) > +#define RX_LAST_BYTE_VALID_SHFT 28 > +#define RX_FIFO_WC_MSK GENMASK(24, 0) > + > +/* SE_GENI_IOS fields */ > +#define IO2_DATA_IN BIT(1) > +#define RX_DATA_IN BIT(0) > + > +/* SE_DMA_TX_IRQ_STAT Register fields */ > +#define TX_DMA_DONE BIT(0) > +#define TX_EOT BIT(1) > +#define TX_SBE BIT(2) > +#define TX_RESET_DONE BIT(3) > + > +/* SE_DMA_RX_IRQ_STAT Register fields */ > +#define RX_DMA_DONE BIT(0) > +#define RX_EOT BIT(1) > +#define RX_SBE BIT(2) > +#define RX_RESET_DONE BIT(3) > +#define RX_FLUSH_DONE BIT(4) > +#define RX_DMA_PARITY_ERR BIT(5) > +#define RX_DMA_BREAK GENMASK(8, 7) > +#define RX_GENI_GP_IRQ GENMASK(10, 5) > +#define RX_GENI_CANCEL_IRQ BIT(11) > +#define RX_GENI_GP_IRQ_EXT GENMASK(13, 12) > + > +/* SE_HW_PARAM_0 fields */ > +#define TX_FIFO_WIDTH_MSK GENMASK(29, 24) > +#define TX_FIFO_WIDTH_SHFT 24 > +/* > + * For QUP HW Version >= 3.10 Tx fifo depth support is increased > + * to 256bytes and corresponding bits are 16 to 23 > + */ > +#define TX_FIFO_DEPTH_MSK_256_BYTES GENMASK(23, 16) > +#define TX_FIFO_DEPTH_MSK GENMASK(21, 16) > +#define TX_FIFO_DEPTH_SHFT 16 > + > +/* SE_HW_PARAM_1 fields */ > +#define RX_FIFO_WIDTH_MSK GENMASK(29, 24) > +#define RX_FIFO_WIDTH_SHFT 24 > +/* > + * For QUP HW Version >= 3.10 Rx fifo depth support is increased > + * to 256bytes and corresponding bits are 16 to 23 > + */ > +#define RX_FIFO_DEPTH_MSK_256_BYTES GENMASK(23, 16) > +#define RX_FIFO_DEPTH_MSK GENMASK(21, 16) > +#define RX_FIFO_DEPTH_SHFT 16 > + > +#define HW_VER_MAJOR_MASK GENMASK(31, 28) > +#define HW_VER_MAJOR_SHFT 28 > +#define HW_VER_MINOR_MASK GENMASK(27, 16) > +#define HW_VER_MINOR_SHFT 16 > +#define HW_VER_STEP_MASK GENMASK(15, 0) > + > +#define GENI_SE_VERSION_MAJOR(ver) ((ver & HW_VER_MAJOR_MASK) >> HW_VER_MAJOR_SHFT) > +#define GENI_SE_VERSION_MINOR(ver) ((ver & HW_VER_MINOR_MASK) >> HW_VER_MINOR_SHFT) > +#define GENI_SE_VERSION_STEP(ver) (ver & HW_VER_STEP_MASK) > + > +/* QUP SE VERSION value for major number 2 and minor number 5 */ > +#define QUP_SE_VERSION_2_5 0x20050000 > + > +#endif >
On 19/04/2024 13:47, Caleb Connolly wrote: > Hi Neil, > > On 18/04/2024 23:47, Neil Armstrong wrote: >> Add Support for the Qualcomm Generic Interface (GENI) I2C interface >> found on newer Qualcomm SoCs. > > \o/ >> >> The Generic Interface (GENI) is a firmware based Qualcomm Universal >> Peripherals (QUP) Serial Engine (SE) Wrapper which can support multiple >> bus protocols depending on the firmware type loaded at early boot time >> based on system configuration. >> >> It also supports the "I2C Master Hub" which is a single function Wrapper >> that only FIFO mode I2C. >> >> It replaces the fixed-function QUP Wrapper found on older SoCs. >> >> The geni-se.h containing the generic GENI Serial Engine registers defines >> is imported from Linux. >> >> Only FIFO mode is implemented, nor SE DMA nor GPI DMA is implemented. > nit: "neither SE DMA nor GPI DMA are implemented" Thx! > > A few minor things below, but otherwise LGTM! >> >> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> >> --- >> drivers/i2c/Kconfig | 10 + >> drivers/i2c/Makefile | 1 + >> drivers/i2c/geni_i2c.c | 576 +++++++++++++++++++++++++++++++++++++++++++++ >> include/soc/qcom/geni-se.h | 265 +++++++++++++++++++++ >> 4 files changed, 852 insertions(+) >> > [...] >> diff --git a/drivers/i2c/geni_i2c.c b/drivers/i2c/geni_i2c.c >> new file mode 100644 >> index 00000000000..8c3ed3bef89 >> --- /dev/null >> +++ b/drivers/i2c/geni_i2c.c >> @@ -0,0 +1,576 @@ >> +// SPDX-License-Identifier: GPL-2.0 >> +/* >> + * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. >> + * Copyright (c) 2024, Linaro Limited >> + * Author: Neil Armstrong <neil.armstrong@linaro.org> >> + * >> + * Based on Linux driver: drivers/i2c/busses/i2c-qcom-geni.c >> + */ >> + > [...] >> +static int geni_i2c_fifo_tx_fill(struct geni_i2c_priv *geni, struct i2c_msg *msg) >> +{ >> + ulong start = get_timer(0); >> + ulong cur_xfer = 0; >> + int i; >> + >> + while (get_timer(start) < I2C_TIMEOUT_MS) { >> + u32 status = readl(geni->base + SE_GENI_M_IRQ_STATUS); >> + >> + if (status & (M_CMD_ABORT_EN | >> + M_CMD_OVERRUN_EN | >> + M_ILLEGAL_CMD_EN | >> + M_CMD_FAILURE_EN | >> + M_GP_IRQ_1_EN | >> + M_GP_IRQ_3_EN | >> + M_GP_IRQ_4_EN)) { >> + debug("%s:%d cmd err\n", __func__, __LINE__); > > How likely are we to hit this? Would it make sense to promote it to a > pr_warn()? > > Please drop the __LINE__ and (if it makes sense to?) print the value of > status. It's used when the tranactions is nacked, so it would spam, so I rather remove the print entirely. It's verly unlikely we see any of the other errors. >> + writel(status, geni->base + SE_GENI_M_IRQ_CLEAR); >> + writel(0, geni->base + SE_GENI_TX_WATERMARK_REG); >> + return -EREMOTEIO; >> + } >> + >> + if ((status & M_TX_FIFO_WATERMARK_EN) == 0) { >> + udelay(1); >> + goto skip_fill; >> + } >> + >> + for (i = 0; i < geni->tx_wm; i++) { >> + u32 temp, tx = 0; >> + unsigned int p = 0; >> + >> + while (cur_xfer < msg->len && p < sizeof(tx)) { >> + temp = msg->buf[cur_xfer++]; >> + tx |= temp << (p * 8); >> + p++; >> + } >> + >> + writel(tx, geni->base + SE_GENI_TX_FIFOn); >> + >> + if (cur_xfer == msg->len) { >> + writel(0, geni->base + SE_GENI_TX_WATERMARK_REG); >> + break; >> + } >> + } >> + >> +skip_fill: >> + writel(status, geni->base + SE_GENI_M_IRQ_CLEAR); >> + >> + if (status & M_CMD_DONE_EN) >> + return 0; >> + } >> + >> + return -ETIMEDOUT; >> +} >> + >> +static int geni_i2c_fifo_rx_drain(struct geni_i2c_priv *geni, struct i2c_msg *msg) >> +{ >> + ulong start = get_timer(0); >> + ulong cur_xfer = 0; >> + int i; >> + >> + while (get_timer(start) < I2C_TIMEOUT_MS) { >> + u32 status = readl(geni->base + SE_GENI_M_IRQ_STATUS); >> + u32 rxstatus = readl(geni->base + SE_GENI_RX_FIFO_STATUS); >> + u32 rxcnt = rxstatus & RX_FIFO_WC_MSK; >> + >> + if (status & (M_CMD_ABORT_EN | >> + M_CMD_FAILURE_EN | >> + M_CMD_OVERRUN_EN | >> + M_ILLEGAL_CMD_EN | >> + M_GP_IRQ_1_EN | >> + M_GP_IRQ_3_EN | >> + M_GP_IRQ_4_EN)) { >> + debug("%s:%d cmd err\n", __func__, __LINE__); > > Ditto >> + writel(status, geni->base + SE_GENI_M_IRQ_CLEAR); >> + return -EIO; >> + } >> + >> + if ((status & (M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN)) == 0) { >> + udelay(1); >> + goto skip_drain; >> + } >> + >> + for (i = 0; cur_xfer < msg->len && i < rxcnt; i++) { >> + u32 rx = readl(geni->base + SE_GENI_RX_FIFOn); >> + unsigned int p = 0; >> + >> + while (cur_xfer < msg->len && p < sizeof(rx)) { >> + msg->buf[cur_xfer++] = rx & 0xff; >> + rx >>= 8; >> + p++; >> + } >> + } >> + >> +skip_drain: >> + writel(status, geni->base + SE_GENI_M_IRQ_CLEAR); >> + >> + if (status & M_CMD_DONE_EN) >> + return 0; >> + } >> + >> + return -ETIMEDOUT; >> +} >> + >> +static int geni_i2c_xfer_tx(struct geni_i2c_priv *geni, struct i2c_msg *msg, u32 params) >> +{ >> + writel(msg->len, geni->base + SE_I2C_TX_TRANS_LEN); >> + geni_i2c_setup_m_cmd(geni, I2C_WRITE, params); >> + writel(1, geni->base + SE_GENI_TX_WATERMARK_REG); >> + >> + return geni_i2c_fifo_tx_fill(geni, msg); >> +} >> + >> +static int geni_i2c_xfer_rx(struct geni_i2c_priv *geni, struct i2c_msg *msg, u32 params) >> +{ >> + writel(msg->len, geni->base + SE_I2C_RX_TRANS_LEN); >> + geni_i2c_setup_m_cmd(geni, I2C_READ, params); >> + >> + return geni_i2c_fifo_rx_drain(geni, msg); >> +} >> + >> +static int geni_i2c_xfer(struct udevice *bus, struct i2c_msg msgs[], int num) >> +{ >> + struct geni_i2c_priv *geni = dev_get_priv(bus); >> + int i, ret; >> + >> + qcom_geni_i2c_conf(geni); >> + >> + for (i = 0; i < num; i++) { >> + struct i2c_msg *msg = &msgs[i]; >> + u32 m_param = i < (num - 1) ? STOP_STRETCH : 0; >> + >> + m_param |= ((msg->addr << SLV_ADDR_SHFT) & SLV_ADDR_MSK); >> + >> + if (msg->flags & I2C_M_RD) >> + ret = geni_i2c_xfer_rx(geni, msg, m_param); >> + else >> + ret = geni_i2c_xfer_tx(geni, msg, m_param); >> + >> + if (ret) >> + break; >> + } >> + >> + if (ret) { >> + if (ret == -ETIMEDOUT) { >> + u32 status; >> + >> + writel(M_GENI_CMD_ABORT, geni->base + SE_GENI_M_CMD_CTRL_REG); >> + >> + /* Wait until Abort has finished */ >> + do { >> + status = readl(geni->base + SE_GENI_M_IRQ_STATUS); >> + } while ((status & M_CMD_ABORT_EN) == 0); >> + >> + writel(status, geni->base + SE_GENI_M_IRQ_STATUS); >> + } >> + >> + return ret; >> + } >> + >> + return 0; >> +} >> + >> +static int geni_i2c_enable_clocks(struct udevice *dev, struct geni_i2c_priv *geni) >> +{ >> + int ret; >> + >> + if (geni->is_master_hub) { >> + ret = clk_enable(&geni->core); >> + if (ret) { >> + dev_err(dev, "clk_enable core failed %d\n", ret); >> + return ret; >> + } >> + } >> + >> + ret = clk_enable(&geni->se); >> + if (ret) { >> + dev_err(dev, "clk_enable se failed %d\n", ret); >> + return ret; >> + } >> + >> + return 0; >> +} >> + >> +static int geni_i2c_disable_clocks(struct udevice *dev, struct geni_i2c_priv *geni) >> +{ >> + int ret; >> + >> + if (geni->is_master_hub) { >> + ret = clk_disable(&geni->core); >> + if (ret) { >> + dev_err(dev, "clk_enable core failed %d\n", ret); >> + return ret; >> + } >> + } >> + >> + ret = clk_disable(&geni->se); >> + if (ret) { >> + dev_err(dev, "clk_enable se failed %d\n", ret); >> + return ret; >> + } >> + >> + return 0; >> +} >> + >> +#define NUM_PACKING_VECTORS 4 >> +#define PACKING_START_SHIFT 5 >> +#define PACKING_DIR_SHIFT 4 >> +#define PACKING_LEN_SHIFT 1 >> +#define PACKING_STOP_BIT BIT(0) >> +#define PACKING_VECTOR_SHIFT 10 >> +void geni_i2c_config_packing(struct geni_i2c_priv *geni, int bpw, int pack_words, >> + bool msb_to_lsb, bool tx_cfg, bool rx_cfg) >> +{ >> + u32 cfg0, cfg1, cfg[NUM_PACKING_VECTORS] = {0}; >> + int len; >> + int temp_bpw = bpw; >> + int idx_start = msb_to_lsb ? bpw - 1 : 0; >> + int idx = idx_start; >> + int idx_delta = msb_to_lsb ? -BITS_PER_BYTE : BITS_PER_BYTE; >> + int ceil_bpw = ALIGN(bpw, BITS_PER_BYTE); >> + int iter = (ceil_bpw * pack_words) / BITS_PER_BYTE; >> + int i; >> + >> + if (iter <= 0 || iter > NUM_PACKING_VECTORS) >> + return; >> + >> + for (i = 0; i < iter; i++) { >> + len = min_t(int, temp_bpw, BITS_PER_BYTE) - 1; >> + cfg[i] = idx << PACKING_START_SHIFT; >> + cfg[i] |= msb_to_lsb << PACKING_DIR_SHIFT; >> + cfg[i] |= len << PACKING_LEN_SHIFT; >> + >> + if (temp_bpw <= BITS_PER_BYTE) { >> + idx = ((i + 1) * BITS_PER_BYTE) + idx_start; >> + temp_bpw = bpw; >> + } else { >> + idx = idx + idx_delta; >> + temp_bpw = temp_bpw - BITS_PER_BYTE; >> + } >> + } >> + cfg[iter - 1] |= PACKING_STOP_BIT; >> + cfg0 = cfg[0] | (cfg[1] << PACKING_VECTOR_SHIFT); >> + cfg1 = cfg[2] | (cfg[3] << PACKING_VECTOR_SHIFT); >> + >> + if (tx_cfg) { >> + writel(cfg0, geni->base + SE_GENI_TX_PACKING_CFG0); >> + writel(cfg1, geni->base + SE_GENI_TX_PACKING_CFG1); >> + } >> + if (rx_cfg) { >> + writel(cfg0, geni->base + SE_GENI_RX_PACKING_CFG0); >> + writel(cfg1, geni->base + SE_GENI_RX_PACKING_CFG1); >> + } >> + >> + /* >> + * Number of protocol words in each FIFO entry >> + * 0 - 4x8, four words in each entry, max word size of 8 bits >> + * 1 - 2x16, two words in each entry, max word size of 16 bits >> + * 2 - 1x32, one word in each entry, max word size of 32 bits >> + * 3 - undefined >> + */ >> + if (pack_words || bpw == 32) >> + writel(bpw / 16, geni->base + SE_GENI_BYTE_GRAN); >> +} >> + >> +static void geni_i2c_init(struct geni_i2c_priv *geni, unsigned int tx_depth) >> +{ >> + u32 val; >> + >> + writel(0, geni->base + SE_GSI_EVENT_EN); >> + writel(0xffffffff, geni->base + SE_GENI_M_IRQ_CLEAR); >> + writel(0xffffffff, geni->base + SE_GENI_S_IRQ_CLEAR); >> + writel(0xffffffff, geni->base + SE_IRQ_EN); >> + >> + val = readl(geni->base + GENI_CGC_CTRL); >> + val |= DEFAULT_CGC_EN; >> + writel(val, geni->base + GENI_CGC_CTRL); >> + >> + writel(DEFAULT_IO_OUTPUT_CTRL_MSK, geni->base + GENI_OUTPUT_CTRL); >> + writel(FORCE_DEFAULT, geni->base + GENI_FORCE_DEFAULT_REG); >> + >> + val = readl(geni->base + SE_IRQ_EN); >> + val |= GENI_M_IRQ_EN | GENI_S_IRQ_EN; >> + writel(val, geni->base + SE_IRQ_EN); >> + >> + val = readl(geni->base + SE_GENI_DMA_MODE_EN); >> + val &= ~GENI_DMA_MODE_EN; >> + writel(val, geni->base + SE_GENI_DMA_MODE_EN); >> + >> + writel(0, geni->base + SE_GSI_EVENT_EN); >> + >> + writel(tx_depth - 1, geni->base + SE_GENI_RX_WATERMARK_REG); >> + writel(tx_depth, geni->base + SE_GENI_RX_RFR_WATERMARK_REG); >> + >> + val = readl(geni->base + SE_GENI_M_IRQ_EN); >> + val |= M_COMMON_GENI_M_IRQ_EN; >> + val |= M_CMD_DONE_EN | M_TX_FIFO_WATERMARK_EN; >> + val |= M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN; >> + writel(val, geni->base + SE_GENI_M_IRQ_EN); >> + >> + val = readl(geni->base + SE_GENI_S_IRQ_EN); >> + val |= S_COMMON_GENI_S_IRQ_EN; >> + writel(val, geni->base + SE_GENI_S_IRQ_EN); >> +} >> + >> +static u32 geni_i2c_get_tx_fifo_depth(struct geni_i2c_priv *geni) >> +{ >> + u32 val, hw_version, hw_major, hw_minor, tx_fifo_depth_mask; >> + >> + hw_version = readl(geni->wrapper + QUP_HW_VER_REG); >> + hw_major = GENI_SE_VERSION_MAJOR(hw_version); >> + hw_minor = GENI_SE_VERSION_MINOR(hw_version); >> + >> + if ((hw_major == 3 && hw_minor >= 10) || hw_major > 3) >> + tx_fifo_depth_mask = TX_FIFO_DEPTH_MSK_256_BYTES; >> + else >> + tx_fifo_depth_mask = TX_FIFO_DEPTH_MSK; >> + >> + val = readl(geni->base + SE_HW_PARAM_0); >> + >> + return (val & tx_fifo_depth_mask) >> TX_FIFO_DEPTH_SHFT; >> +} >> + >> +static int geni_i2c_probe(struct udevice *dev) >> +{ >> + ofnode parent_node = ofnode_get_parent(dev_ofnode(dev)); >> + struct geni_i2c_priv *geni = dev_get_priv(dev); >> + u32 proto, tx_depth, fifo_disable; >> + int ret; >> + >> + geni->is_master_hub = dev_get_driver_data(dev) & GENI_I2C_IS_MASTER_HUB; >> + >> + geni->wrapper = ofnode_get_addr(parent_node); >> + if (geni->wrapper == FDT_ADDR_T_NONE) >> + return -EINVAL; >> + >> + geni->base = (phys_addr_t)dev_read_addr_ptr(dev); >> + if (!geni->base) >> + return -EINVAL; >> + >> + if (geni->is_master_hub) { >> + ret = clk_get_by_name(dev, "core", &geni->core); >> + if (ret) { >> + pr_err("clk_get_by_name(core) failed: %d\n", ret); > > In other places you used dev_err(), but here it's pr_err() (even though > dev is available), and below it's pr_err() with __func__ as the prefix. > Please make these consistent. Ack >> + return ret; >> + } >> + } >> + >> + ret = clk_get_by_name(dev, "se", &geni->se); >> + if (ret) { >> + pr_err("clk_get_by_name(iface) failed: %d\n", ret); >> + return ret; >> + } >> + >> + geni_i2c_enable_clocks(dev, geni); >> + >> + proto = readl(geni->base + GENI_FW_REVISION_RO); >> + proto &= FW_REV_PROTOCOL_MSK; >> + proto >>= FW_REV_PROTOCOL_SHFT; >> + >> + if (proto != GENI_SE_I2C) { >> + pr_err("%s: Invalid proto %d\n", __func__, proto); >> + geni_i2c_disable_clocks(dev, geni); >> + return -ENXIO; >> + } >> + >> + fifo_disable = readl(geni->base + GENI_IF_DISABLE_RO) & FIFO_IF_DISABLE; >> + if (fifo_disable) { >> + geni_i2c_disable_clocks(dev, geni); >> + pr_err("%s: FIFO mode disabled, DMA mode unsupported\n", __func__); >> + return -ENXIO; >> + } >> + >> + if (!geni->is_master_hub) { >> + tx_depth = geni_i2c_get_tx_fifo_depth(geni); >> + if (!tx_depth) { >> + geni_i2c_disable_clocks(dev, geni); >> + pr_err("%s: Invalid TX FIFO depth\n", __func__); >> + return -ENXIO; >> + } >> + } else { >> + tx_depth = 16; >> + } >> + geni->tx_wm = tx_depth - 1; >> + >> + geni_i2c_init(geni, tx_depth); >> + geni_i2c_config_packing(geni, BITS_PER_BYTE, >> + PACKING_BYTES_PW, true, true, true); >> + >> + /* Setup for standard rate */ >> + return geni_i2c_clk_map_idx(geni, I2C_SPEED_STANDARD_RATE); >> +} >> + >> +static int geni_i2c_set_bus_speed(struct udevice *dev, unsigned int clk_freq) >> +{ >> + struct geni_i2c_priv *geni = dev_get_priv(dev); >> + >> + return geni_i2c_clk_map_idx(geni, clk_freq); >> +} >> + >> +static const struct dm_i2c_ops geni_i2c_ops = { >> + .xfer = geni_i2c_xfer, >> + .set_bus_speed = geni_i2c_set_bus_speed, >> +}; >> + >> +static const struct udevice_id geni_i2c_ids[] = { >> + { .compatible = "qcom,geni-i2c" }, >> + { .compatible = "qcom,geni-i2c-master-hub", .data = GENI_I2C_IS_MASTER_HUB}, >> + {} >> +}; >> + >> +U_BOOT_DRIVER(i2c_geni) = { >> + .name = "i2c_geni", >> + .id = UCLASS_I2C, >> + .of_match = geni_i2c_ids, >> + .probe = geni_i2c_probe, >> + .priv_auto = sizeof(struct geni_i2c_priv), >> + .ops = &geni_i2c_ops, >> +}; >> + >> +static const struct udevice_id geni_i2c_master_hub_ids[] = { >> + { .compatible = "qcom,geni-se-i2c-master-hub" }, >> + { } >> +}; >> + >> +U_BOOT_DRIVER(geni_i2c_master_hub) = { >> + .name = "geni-se-master-hub", >> + .id = UCLASS_NOP, >> + .of_match = geni_i2c_master_hub_ids, >> + .bind = dm_scan_fdt_dev, >> + .flags = DM_FLAG_PRE_RELOC | DM_FLAG_DEFAULT_PD_CTRL_OFF, >> +}; >> diff --git a/include/soc/qcom/geni-se.h b/include/soc/qcom/geni-se.h >> new file mode 100644 >> index 00000000000..698a9256d26 >> --- /dev/null >> +++ b/include/soc/qcom/geni-se.h >> @@ -0,0 +1,265 @@ >> +/* SPDX-License-Identifier: GPL-2.0 */ >> +/* >> + * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. >> + */ >> + >> +#ifndef _QCOM_GENI_SE >> +#define _QCOM_GENI_SE >> + >> +/* Protocols supported by GENI Serial Engines */ >> +enum geni_se_protocol_type { >> + GENI_SE_NONE, >> + GENI_SE_SPI, >> + GENI_SE_UART, >> + GENI_SE_I2C, >> + GENI_SE_I3C, >> + GENI_SE_SPI_SLAVE, >> +}; >> + >> +#define QUP_HW_VER_REG 0x4 >> + >> +/* Common SE registers */ >> +#define GENI_INIT_CFG_REVISION 0x0 >> +#define GENI_S_INIT_CFG_REVISION 0x4 >> +#define GENI_FORCE_DEFAULT_REG 0x20 >> +#define GENI_OUTPUT_CTRL 0x24 >> +#define GENI_CGC_CTRL 0x28 >> +#define SE_GENI_STATUS 0x40 >> +#define GENI_SER_M_CLK_CFG 0x48 >> +#define GENI_SER_S_CLK_CFG 0x4c >> +#define GENI_IF_DISABLE_RO 0x64 >> +#define GENI_FW_REVISION_RO 0x68 >> +#define SE_GENI_CLK_SEL 0x7c >> +#define SE_GENI_CFG_SEQ_START 0x84 >> +#define SE_GENI_BYTE_GRAN 0x254 >> +#define SE_GENI_DMA_MODE_EN 0x258 >> +#define SE_GENI_TX_PACKING_CFG0 0x260 >> +#define SE_GENI_TX_PACKING_CFG1 0x264 >> +#define SE_GENI_RX_PACKING_CFG0 0x284 >> +#define SE_GENI_RX_PACKING_CFG1 0x288 >> +#define SE_GENI_M_CMD0 0x600 >> +#define SE_GENI_M_CMD_CTRL_REG 0x604 >> +#define SE_GENI_M_IRQ_STATUS 0x610 >> +#define SE_GENI_M_IRQ_EN 0x614 >> +#define SE_GENI_M_IRQ_CLEAR 0x618 >> +#define SE_GENI_S_CMD0 0x630 >> +#define SE_GENI_S_CMD_CTRL_REG 0x634 >> +#define SE_GENI_S_IRQ_STATUS 0x640 >> +#define SE_GENI_S_IRQ_EN 0x644 >> +#define SE_GENI_S_IRQ_CLEAR 0x648 >> +#define SE_GENI_TX_FIFOn 0x700 >> +#define SE_GENI_RX_FIFOn 0x780 >> +#define SE_GENI_TX_FIFO_STATUS 0x800 >> +#define SE_GENI_RX_FIFO_STATUS 0x804 >> +#define SE_GENI_TX_WATERMARK_REG 0x80c >> +#define SE_GENI_RX_WATERMARK_REG 0x810 >> +#define SE_GENI_RX_RFR_WATERMARK_REG 0x814 >> +#define SE_GENI_IOS 0x908 >> +#define SE_DMA_TX_IRQ_STAT 0xc40 >> +#define SE_DMA_TX_IRQ_CLR 0xc44 >> +#define SE_DMA_TX_FSM_RST 0xc58 >> +#define SE_DMA_RX_IRQ_STAT 0xd40 >> +#define SE_DMA_RX_IRQ_CLR 0xd44 >> +#define SE_DMA_RX_LEN_IN 0xd54 >> +#define SE_DMA_RX_FSM_RST 0xd58 >> +#define SE_GSI_EVENT_EN 0xe18 >> +#define SE_IRQ_EN 0xe1c >> +#define SE_HW_PARAM_0 0xe24 >> +#define SE_HW_PARAM_1 0xe28 >> + >> +/* GENI_FORCE_DEFAULT_REG fields */ >> +#define FORCE_DEFAULT BIT(0) >> + >> +/* GENI_OUTPUT_CTRL fields */ >> +#define GENI_IO_MUX_0_EN BIT(0) >> +#define DEFAULT_IO_OUTPUT_CTRL_MSK GENMASK(6, 0) >> + >> +/* GENI_CGC_CTRL fields */ >> +#define CFG_AHB_CLK_CGC_ON BIT(0) >> +#define CFG_AHB_WR_ACLK_CGC_ON BIT(1) >> +#define DATA_AHB_CLK_CGC_ON BIT(2) >> +#define SCLK_CGC_ON BIT(3) >> +#define TX_CLK_CGC_ON BIT(4) >> +#define RX_CLK_CGC_ON BIT(5) >> +#define EXT_CLK_CGC_ON BIT(6) >> +#define PROG_RAM_HCLK_OFF BIT(8) >> +#define PROG_RAM_SCLK_OFF BIT(9) >> +#define DEFAULT_CGC_EN GENMASK(6, 0) >> + >> +/* GENI_STATUS fields */ >> +#define M_GENI_CMD_ACTIVE BIT(0) >> +#define S_GENI_CMD_ACTIVE BIT(12) >> + >> +/* GENI_SER_M_CLK_CFG/GENI_SER_S_CLK_CFG */ >> +#define SER_CLK_EN BIT(0) >> +#define CLK_DIV_MSK GENMASK(15, 4) >> +#define CLK_DIV_SHFT 4 >> + >> +/* GENI_IF_DISABLE_RO fields */ >> +#define FIFO_IF_DISABLE (BIT(0)) >> + >> +/* GENI_FW_REVISION_RO fields */ >> +#define FW_REV_PROTOCOL_MSK GENMASK(15, 8) >> +#define FW_REV_PROTOCOL_SHFT 8 >> + >> +/* GENI_CLK_SEL fields */ >> +#define CLK_SEL_MSK GENMASK(2, 0) >> + >> +/* SE_GENI_CFG_SEQ_START fields */ >> +#define START_TRIGGER BIT(0) >> + >> +/* SE_IRQ_EN fields */ >> +#define DMA_RX_IRQ_EN BIT(0) >> +#define DMA_TX_IRQ_EN BIT(1) >> +#define GENI_M_IRQ_EN BIT(2) >> +#define GENI_S_IRQ_EN BIT(3) >> + >> +/* SE_GENI_DMA_MODE_EN */ >> +#define GENI_DMA_MODE_EN BIT(0) >> + >> +/* GENI_M_CMD0 fields */ >> +#define M_OPCODE_MSK GENMASK(31, 27) >> +#define M_OPCODE_SHFT 27 >> +#define M_PARAMS_MSK GENMASK(26, 0) >> + >> +/* GENI_M_CMD_CTRL_REG */ >> +#define M_GENI_CMD_CANCEL BIT(2) >> +#define M_GENI_CMD_ABORT BIT(1) >> +#define M_GENI_DISABLE BIT(0) >> + >> +/* GENI_S_CMD0 fields */ >> +#define S_OPCODE_MSK GENMASK(31, 27) >> +#define S_OPCODE_SHFT 27 >> +#define S_PARAMS_MSK GENMASK(26, 0) >> + >> +/* GENI_S_CMD_CTRL_REG */ >> +#define S_GENI_CMD_CANCEL BIT(2) >> +#define S_GENI_CMD_ABORT BIT(1) >> +#define S_GENI_DISABLE BIT(0) >> + >> +/* GENI_M_IRQ_EN fields */ >> +#define M_CMD_DONE_EN BIT(0) >> +#define M_CMD_OVERRUN_EN BIT(1) >> +#define M_ILLEGAL_CMD_EN BIT(2) >> +#define M_CMD_FAILURE_EN BIT(3) >> +#define M_CMD_CANCEL_EN BIT(4) >> +#define M_CMD_ABORT_EN BIT(5) >> +#define M_TIMESTAMP_EN BIT(6) >> +#define M_RX_IRQ_EN BIT(7) >> +#define M_GP_SYNC_IRQ_0_EN BIT(8) >> +#define M_GP_IRQ_0_EN BIT(9) >> +#define M_GP_IRQ_1_EN BIT(10) >> +#define M_GP_IRQ_2_EN BIT(11) >> +#define M_GP_IRQ_3_EN BIT(12) >> +#define M_GP_IRQ_4_EN BIT(13) >> +#define M_GP_IRQ_5_EN BIT(14) >> +#define M_TX_FIFO_NOT_EMPTY_EN BIT(21) >> +#define M_IO_DATA_DEASSERT_EN BIT(22) >> +#define M_IO_DATA_ASSERT_EN BIT(23) >> +#define M_RX_FIFO_RD_ERR_EN BIT(24) >> +#define M_RX_FIFO_WR_ERR_EN BIT(25) >> +#define M_RX_FIFO_WATERMARK_EN BIT(26) >> +#define M_RX_FIFO_LAST_EN BIT(27) >> +#define M_TX_FIFO_RD_ERR_EN BIT(28) >> +#define M_TX_FIFO_WR_ERR_EN BIT(29) >> +#define M_TX_FIFO_WATERMARK_EN BIT(30) >> +#define M_SEC_IRQ_EN BIT(31) >> +#define M_COMMON_GENI_M_IRQ_EN (GENMASK(6, 1) | \ >> + M_IO_DATA_DEASSERT_EN | \ >> + M_IO_DATA_ASSERT_EN | M_RX_FIFO_RD_ERR_EN | \ >> + M_RX_FIFO_WR_ERR_EN | M_TX_FIFO_RD_ERR_EN | \ >> + M_TX_FIFO_WR_ERR_EN) >> + >> +/* GENI_S_IRQ_EN fields */ >> +#define S_CMD_DONE_EN BIT(0) >> +#define S_CMD_OVERRUN_EN BIT(1) >> +#define S_ILLEGAL_CMD_EN BIT(2) >> +#define S_CMD_FAILURE_EN BIT(3) >> +#define S_CMD_CANCEL_EN BIT(4) >> +#define S_CMD_ABORT_EN BIT(5) >> +#define S_GP_SYNC_IRQ_0_EN BIT(8) >> +#define S_GP_IRQ_0_EN BIT(9) >> +#define S_GP_IRQ_1_EN BIT(10) >> +#define S_GP_IRQ_2_EN BIT(11) >> +#define S_GP_IRQ_3_EN BIT(12) >> +#define S_GP_IRQ_4_EN BIT(13) >> +#define S_GP_IRQ_5_EN BIT(14) >> +#define S_IO_DATA_DEASSERT_EN BIT(22) >> +#define S_IO_DATA_ASSERT_EN BIT(23) >> +#define S_RX_FIFO_RD_ERR_EN BIT(24) >> +#define S_RX_FIFO_WR_ERR_EN BIT(25) >> +#define S_RX_FIFO_WATERMARK_EN BIT(26) >> +#define S_RX_FIFO_LAST_EN BIT(27) >> +#define S_COMMON_GENI_S_IRQ_EN (GENMASK(5, 1) | GENMASK(13, 9) | \ >> + S_RX_FIFO_RD_ERR_EN | S_RX_FIFO_WR_ERR_EN) >> + >> +/* GENI_/TX/RX/RX_RFR/_WATERMARK_REG fields */ >> +#define WATERMARK_MSK GENMASK(5, 0) >> + >> +/* GENI_TX_FIFO_STATUS fields */ >> +#define TX_FIFO_WC GENMASK(27, 0) >> + >> +/* GENI_RX_FIFO_STATUS fields */ >> +#define RX_LAST BIT(31) >> +#define RX_LAST_BYTE_VALID_MSK GENMASK(30, 28) >> +#define RX_LAST_BYTE_VALID_SHFT 28 >> +#define RX_FIFO_WC_MSK GENMASK(24, 0) >> + >> +/* SE_GENI_IOS fields */ >> +#define IO2_DATA_IN BIT(1) >> +#define RX_DATA_IN BIT(0) >> + >> +/* SE_DMA_TX_IRQ_STAT Register fields */ >> +#define TX_DMA_DONE BIT(0) >> +#define TX_EOT BIT(1) >> +#define TX_SBE BIT(2) >> +#define TX_RESET_DONE BIT(3) >> + >> +/* SE_DMA_RX_IRQ_STAT Register fields */ >> +#define RX_DMA_DONE BIT(0) >> +#define RX_EOT BIT(1) >> +#define RX_SBE BIT(2) >> +#define RX_RESET_DONE BIT(3) >> +#define RX_FLUSH_DONE BIT(4) >> +#define RX_DMA_PARITY_ERR BIT(5) >> +#define RX_DMA_BREAK GENMASK(8, 7) >> +#define RX_GENI_GP_IRQ GENMASK(10, 5) >> +#define RX_GENI_CANCEL_IRQ BIT(11) >> +#define RX_GENI_GP_IRQ_EXT GENMASK(13, 12) >> + >> +/* SE_HW_PARAM_0 fields */ >> +#define TX_FIFO_WIDTH_MSK GENMASK(29, 24) >> +#define TX_FIFO_WIDTH_SHFT 24 >> +/* >> + * For QUP HW Version >= 3.10 Tx fifo depth support is increased >> + * to 256bytes and corresponding bits are 16 to 23 >> + */ >> +#define TX_FIFO_DEPTH_MSK_256_BYTES GENMASK(23, 16) >> +#define TX_FIFO_DEPTH_MSK GENMASK(21, 16) >> +#define TX_FIFO_DEPTH_SHFT 16 >> + >> +/* SE_HW_PARAM_1 fields */ >> +#define RX_FIFO_WIDTH_MSK GENMASK(29, 24) >> +#define RX_FIFO_WIDTH_SHFT 24 >> +/* >> + * For QUP HW Version >= 3.10 Rx fifo depth support is increased >> + * to 256bytes and corresponding bits are 16 to 23 >> + */ >> +#define RX_FIFO_DEPTH_MSK_256_BYTES GENMASK(23, 16) >> +#define RX_FIFO_DEPTH_MSK GENMASK(21, 16) >> +#define RX_FIFO_DEPTH_SHFT 16 >> + >> +#define HW_VER_MAJOR_MASK GENMASK(31, 28) >> +#define HW_VER_MAJOR_SHFT 28 >> +#define HW_VER_MINOR_MASK GENMASK(27, 16) >> +#define HW_VER_MINOR_SHFT 16 >> +#define HW_VER_STEP_MASK GENMASK(15, 0) >> + >> +#define GENI_SE_VERSION_MAJOR(ver) ((ver & HW_VER_MAJOR_MASK) >> HW_VER_MAJOR_SHFT) >> +#define GENI_SE_VERSION_MINOR(ver) ((ver & HW_VER_MINOR_MASK) >> HW_VER_MINOR_SHFT) >> +#define GENI_SE_VERSION_STEP(ver) (ver & HW_VER_STEP_MASK) >> + >> +/* QUP SE VERSION value for major number 2 and minor number 5 */ >> +#define QUP_SE_VERSION_2_5 0x20050000 >> + >> +#endif >> > Thanks, Neil
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig index 59c635af80b..34b02114dc6 100644 --- a/drivers/i2c/Kconfig +++ b/drivers/i2c/Kconfig @@ -638,6 +638,16 @@ config SYS_I2C_QUP Technical Reference Manual, chapter "6.1 Qualcomm Universal Peripherals Engine (QUP)". +config SYS_I2C_GENI + bool "Qualcomm Generic Interface (GENI) I2C controller" + depends on ARCH_SNAPDRAGON + help + Support for the Qualcomm Generic Interface (GENI) I2C interface. + The Generic Interface (GENI) is a firmware based Qualcomm Universal + Peripherals (QUP) Serial Engine (SE) Wrapper which can support multiple + bus protocols depending on the firmware type loaded at early boot time + based on system configuration. + config SYS_I2C_S3C24X0 bool "Samsung I2C driver" depends on (ARCH_EXYNOS4 || ARCH_EXYNOS5) && DM_I2C diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile index 692f63bafd0..00b90523c62 100644 --- a/drivers/i2c/Makefile +++ b/drivers/i2c/Makefile @@ -20,6 +20,7 @@ obj-$(CONFIG_SYS_I2C_DAVINCI) += davinci_i2c.o obj-$(CONFIG_SYS_I2C_DW) += designware_i2c.o obj-$(CONFIG_SYS_I2C_DW_PCI) += designware_i2c_pci.o obj-$(CONFIG_SYS_I2C_FSL) += fsl_i2c.o +obj-$(CONFIG_SYS_I2C_GENI) += geni_i2c.o obj-$(CONFIG_SYS_I2C_IHS) += ihs_i2c.o obj-$(CONFIG_SYS_I2C_INTEL) += intel_i2c.o obj-$(CONFIG_SYS_I2C_IMX_LPI2C) += imx_lpi2c.o diff --git a/drivers/i2c/geni_i2c.c b/drivers/i2c/geni_i2c.c new file mode 100644 index 00000000000..8c3ed3bef89 --- /dev/null +++ b/drivers/i2c/geni_i2c.c @@ -0,0 +1,576 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. + * Copyright (c) 2024, Linaro Limited + * Author: Neil Armstrong <neil.armstrong@linaro.org> + * + * Based on Linux driver: drivers/i2c/busses/i2c-qcom-geni.c + */ + +#include <log.h> +#include <dm/device.h> +#include <dm/read.h> +#include <dm/device_compat.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/err.h> +#include <linux/bitops.h> +#include <asm/io.h> +#include <i2c.h> +#include <fdtdec.h> +#include <clk.h> +#include <reset.h> +#include <time.h> +#include <soc/qcom/geni-se.h> + +#define SE_I2C_TX_TRANS_LEN 0x26c +#define SE_I2C_RX_TRANS_LEN 0x270 +#define SE_I2C_SCL_COUNTERS 0x278 + +#define SE_I2C_ERR (M_CMD_OVERRUN_EN | M_ILLEGAL_CMD_EN | M_CMD_FAILURE_EN |\ + M_GP_IRQ_1_EN | M_GP_IRQ_3_EN | M_GP_IRQ_4_EN) +#define SE_I2C_ABORT BIT(1) + +/* M_CMD OP codes for I2C */ +#define I2C_WRITE 0x1 +#define I2C_READ 0x2 +#define I2C_WRITE_READ 0x3 +#define I2C_ADDR_ONLY 0x4 +#define I2C_BUS_CLEAR 0x6 +#define I2C_STOP_ON_BUS 0x7 +/* M_CMD params for I2C */ +#define PRE_CMD_DELAY BIT(0) +#define TIMESTAMP_BEFORE BIT(1) +#define STOP_STRETCH BIT(2) +#define TIMESTAMP_AFTER BIT(3) +#define POST_COMMAND_DELAY BIT(4) +#define IGNORE_ADD_NACK BIT(6) +#define READ_FINISHED_WITH_ACK BIT(7) +#define BYPASS_ADDR_PHASE BIT(8) +#define SLV_ADDR_MSK GENMASK(15, 9) +#define SLV_ADDR_SHFT 9 +/* I2C SCL COUNTER fields */ +#define HIGH_COUNTER_MSK GENMASK(29, 20) +#define HIGH_COUNTER_SHFT 20 +#define LOW_COUNTER_MSK GENMASK(19, 10) +#define LOW_COUNTER_SHFT 10 +#define CYCLE_COUNTER_MSK GENMASK(9, 0) + +#define I2C_PACK_TX BIT(0) +#define I2C_PACK_RX BIT(1) + +#define PACKING_BYTES_PW 4 + +#define GENI_I2C_IS_MASTER_HUB BIT(0) + +#define I2C_TIMEOUT_MS 100 + +struct geni_i2c_clk_fld { + u32 clk_freq_out; + u8 clk_div; + u8 t_high_cnt; + u8 t_low_cnt; + u8 t_cycle_cnt; +}; + +struct geni_i2c_priv { + fdt_addr_t wrapper; + phys_addr_t base; + struct clk core; + struct clk se; + u32 tx_wm; + bool is_master_hub; + const struct geni_i2c_clk_fld *clk_fld; +}; + +/* + * Hardware uses the underlying formula to calculate time periods of + * SCL clock cycle. Firmware uses some additional cycles excluded from the + * below formula and it is confirmed that the time periods are within + * specification limits. + * + * time of high period of SCL: t_high = (t_high_cnt * clk_div) / source_clock + * time of low period of SCL: t_low = (t_low_cnt * clk_div) / source_clock + * time of full period of SCL: t_cycle = (t_cycle_cnt * clk_div) / source_clock + * clk_freq_out = t / t_cycle + * source_clock = 19.2 MHz + */ +static const struct geni_i2c_clk_fld geni_i2c_clk_map[] = { + {I2C_SPEED_STANDARD_RATE, 7, 10, 11, 26}, + {I2C_SPEED_FAST_RATE, 2, 5, 12, 24}, + {I2C_SPEED_FAST_PLUS_RATE, 1, 3, 9, 18}, +}; + +static int geni_i2c_clk_map_idx(struct geni_i2c_priv *geni, unsigned int clk_freq) +{ + const struct geni_i2c_clk_fld *itr = geni_i2c_clk_map; + int i; + + for (i = 0; i < ARRAY_SIZE(geni_i2c_clk_map); i++, itr++) { + if (itr->clk_freq_out == clk_freq) { + geni->clk_fld = itr; + return 0; + } + } + + return -EINVAL; +} + +static void geni_i2c_setup_m_cmd(struct geni_i2c_priv *geni, u32 cmd, u32 params) +{ + u32 m_cmd; + + m_cmd = (cmd << M_OPCODE_SHFT) | (params & M_PARAMS_MSK); + writel(m_cmd, geni->base + SE_GENI_M_CMD0); +} + +static void qcom_geni_i2c_conf(struct geni_i2c_priv *geni) +{ + const struct geni_i2c_clk_fld *itr = geni->clk_fld; + u32 val; + + writel(0, geni->base + SE_GENI_CLK_SEL); + + val = (itr->clk_div << CLK_DIV_SHFT) | SER_CLK_EN; + writel(val, geni->base + GENI_SER_M_CLK_CFG); + + val = itr->t_high_cnt << HIGH_COUNTER_SHFT; + val |= itr->t_low_cnt << LOW_COUNTER_SHFT; + val |= itr->t_cycle_cnt; + writel(val, geni->base + SE_I2C_SCL_COUNTERS); + + writel(0xffffffff, geni->base + SE_GENI_M_IRQ_CLEAR); +} + +static int geni_i2c_fifo_tx_fill(struct geni_i2c_priv *geni, struct i2c_msg *msg) +{ + ulong start = get_timer(0); + ulong cur_xfer = 0; + int i; + + while (get_timer(start) < I2C_TIMEOUT_MS) { + u32 status = readl(geni->base + SE_GENI_M_IRQ_STATUS); + + if (status & (M_CMD_ABORT_EN | + M_CMD_OVERRUN_EN | + M_ILLEGAL_CMD_EN | + M_CMD_FAILURE_EN | + M_GP_IRQ_1_EN | + M_GP_IRQ_3_EN | + M_GP_IRQ_4_EN)) { + debug("%s:%d cmd err\n", __func__, __LINE__); + writel(status, geni->base + SE_GENI_M_IRQ_CLEAR); + writel(0, geni->base + SE_GENI_TX_WATERMARK_REG); + return -EREMOTEIO; + } + + if ((status & M_TX_FIFO_WATERMARK_EN) == 0) { + udelay(1); + goto skip_fill; + } + + for (i = 0; i < geni->tx_wm; i++) { + u32 temp, tx = 0; + unsigned int p = 0; + + while (cur_xfer < msg->len && p < sizeof(tx)) { + temp = msg->buf[cur_xfer++]; + tx |= temp << (p * 8); + p++; + } + + writel(tx, geni->base + SE_GENI_TX_FIFOn); + + if (cur_xfer == msg->len) { + writel(0, geni->base + SE_GENI_TX_WATERMARK_REG); + break; + } + } + +skip_fill: + writel(status, geni->base + SE_GENI_M_IRQ_CLEAR); + + if (status & M_CMD_DONE_EN) + return 0; + } + + return -ETIMEDOUT; +} + +static int geni_i2c_fifo_rx_drain(struct geni_i2c_priv *geni, struct i2c_msg *msg) +{ + ulong start = get_timer(0); + ulong cur_xfer = 0; + int i; + + while (get_timer(start) < I2C_TIMEOUT_MS) { + u32 status = readl(geni->base + SE_GENI_M_IRQ_STATUS); + u32 rxstatus = readl(geni->base + SE_GENI_RX_FIFO_STATUS); + u32 rxcnt = rxstatus & RX_FIFO_WC_MSK; + + if (status & (M_CMD_ABORT_EN | + M_CMD_FAILURE_EN | + M_CMD_OVERRUN_EN | + M_ILLEGAL_CMD_EN | + M_GP_IRQ_1_EN | + M_GP_IRQ_3_EN | + M_GP_IRQ_4_EN)) { + debug("%s:%d cmd err\n", __func__, __LINE__); + writel(status, geni->base + SE_GENI_M_IRQ_CLEAR); + return -EIO; + } + + if ((status & (M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN)) == 0) { + udelay(1); + goto skip_drain; + } + + for (i = 0; cur_xfer < msg->len && i < rxcnt; i++) { + u32 rx = readl(geni->base + SE_GENI_RX_FIFOn); + unsigned int p = 0; + + while (cur_xfer < msg->len && p < sizeof(rx)) { + msg->buf[cur_xfer++] = rx & 0xff; + rx >>= 8; + p++; + } + } + +skip_drain: + writel(status, geni->base + SE_GENI_M_IRQ_CLEAR); + + if (status & M_CMD_DONE_EN) + return 0; + } + + return -ETIMEDOUT; +} + +static int geni_i2c_xfer_tx(struct geni_i2c_priv *geni, struct i2c_msg *msg, u32 params) +{ + writel(msg->len, geni->base + SE_I2C_TX_TRANS_LEN); + geni_i2c_setup_m_cmd(geni, I2C_WRITE, params); + writel(1, geni->base + SE_GENI_TX_WATERMARK_REG); + + return geni_i2c_fifo_tx_fill(geni, msg); +} + +static int geni_i2c_xfer_rx(struct geni_i2c_priv *geni, struct i2c_msg *msg, u32 params) +{ + writel(msg->len, geni->base + SE_I2C_RX_TRANS_LEN); + geni_i2c_setup_m_cmd(geni, I2C_READ, params); + + return geni_i2c_fifo_rx_drain(geni, msg); +} + +static int geni_i2c_xfer(struct udevice *bus, struct i2c_msg msgs[], int num) +{ + struct geni_i2c_priv *geni = dev_get_priv(bus); + int i, ret; + + qcom_geni_i2c_conf(geni); + + for (i = 0; i < num; i++) { + struct i2c_msg *msg = &msgs[i]; + u32 m_param = i < (num - 1) ? STOP_STRETCH : 0; + + m_param |= ((msg->addr << SLV_ADDR_SHFT) & SLV_ADDR_MSK); + + if (msg->flags & I2C_M_RD) + ret = geni_i2c_xfer_rx(geni, msg, m_param); + else + ret = geni_i2c_xfer_tx(geni, msg, m_param); + + if (ret) + break; + } + + if (ret) { + if (ret == -ETIMEDOUT) { + u32 status; + + writel(M_GENI_CMD_ABORT, geni->base + SE_GENI_M_CMD_CTRL_REG); + + /* Wait until Abort has finished */ + do { + status = readl(geni->base + SE_GENI_M_IRQ_STATUS); + } while ((status & M_CMD_ABORT_EN) == 0); + + writel(status, geni->base + SE_GENI_M_IRQ_STATUS); + } + + return ret; + } + + return 0; +} + +static int geni_i2c_enable_clocks(struct udevice *dev, struct geni_i2c_priv *geni) +{ + int ret; + + if (geni->is_master_hub) { + ret = clk_enable(&geni->core); + if (ret) { + dev_err(dev, "clk_enable core failed %d\n", ret); + return ret; + } + } + + ret = clk_enable(&geni->se); + if (ret) { + dev_err(dev, "clk_enable se failed %d\n", ret); + return ret; + } + + return 0; +} + +static int geni_i2c_disable_clocks(struct udevice *dev, struct geni_i2c_priv *geni) +{ + int ret; + + if (geni->is_master_hub) { + ret = clk_disable(&geni->core); + if (ret) { + dev_err(dev, "clk_enable core failed %d\n", ret); + return ret; + } + } + + ret = clk_disable(&geni->se); + if (ret) { + dev_err(dev, "clk_enable se failed %d\n", ret); + return ret; + } + + return 0; +} + +#define NUM_PACKING_VECTORS 4 +#define PACKING_START_SHIFT 5 +#define PACKING_DIR_SHIFT 4 +#define PACKING_LEN_SHIFT 1 +#define PACKING_STOP_BIT BIT(0) +#define PACKING_VECTOR_SHIFT 10 +void geni_i2c_config_packing(struct geni_i2c_priv *geni, int bpw, int pack_words, + bool msb_to_lsb, bool tx_cfg, bool rx_cfg) +{ + u32 cfg0, cfg1, cfg[NUM_PACKING_VECTORS] = {0}; + int len; + int temp_bpw = bpw; + int idx_start = msb_to_lsb ? bpw - 1 : 0; + int idx = idx_start; + int idx_delta = msb_to_lsb ? -BITS_PER_BYTE : BITS_PER_BYTE; + int ceil_bpw = ALIGN(bpw, BITS_PER_BYTE); + int iter = (ceil_bpw * pack_words) / BITS_PER_BYTE; + int i; + + if (iter <= 0 || iter > NUM_PACKING_VECTORS) + return; + + for (i = 0; i < iter; i++) { + len = min_t(int, temp_bpw, BITS_PER_BYTE) - 1; + cfg[i] = idx << PACKING_START_SHIFT; + cfg[i] |= msb_to_lsb << PACKING_DIR_SHIFT; + cfg[i] |= len << PACKING_LEN_SHIFT; + + if (temp_bpw <= BITS_PER_BYTE) { + idx = ((i + 1) * BITS_PER_BYTE) + idx_start; + temp_bpw = bpw; + } else { + idx = idx + idx_delta; + temp_bpw = temp_bpw - BITS_PER_BYTE; + } + } + cfg[iter - 1] |= PACKING_STOP_BIT; + cfg0 = cfg[0] | (cfg[1] << PACKING_VECTOR_SHIFT); + cfg1 = cfg[2] | (cfg[3] << PACKING_VECTOR_SHIFT); + + if (tx_cfg) { + writel(cfg0, geni->base + SE_GENI_TX_PACKING_CFG0); + writel(cfg1, geni->base + SE_GENI_TX_PACKING_CFG1); + } + if (rx_cfg) { + writel(cfg0, geni->base + SE_GENI_RX_PACKING_CFG0); + writel(cfg1, geni->base + SE_GENI_RX_PACKING_CFG1); + } + + /* + * Number of protocol words in each FIFO entry + * 0 - 4x8, four words in each entry, max word size of 8 bits + * 1 - 2x16, two words in each entry, max word size of 16 bits + * 2 - 1x32, one word in each entry, max word size of 32 bits + * 3 - undefined + */ + if (pack_words || bpw == 32) + writel(bpw / 16, geni->base + SE_GENI_BYTE_GRAN); +} + +static void geni_i2c_init(struct geni_i2c_priv *geni, unsigned int tx_depth) +{ + u32 val; + + writel(0, geni->base + SE_GSI_EVENT_EN); + writel(0xffffffff, geni->base + SE_GENI_M_IRQ_CLEAR); + writel(0xffffffff, geni->base + SE_GENI_S_IRQ_CLEAR); + writel(0xffffffff, geni->base + SE_IRQ_EN); + + val = readl(geni->base + GENI_CGC_CTRL); + val |= DEFAULT_CGC_EN; + writel(val, geni->base + GENI_CGC_CTRL); + + writel(DEFAULT_IO_OUTPUT_CTRL_MSK, geni->base + GENI_OUTPUT_CTRL); + writel(FORCE_DEFAULT, geni->base + GENI_FORCE_DEFAULT_REG); + + val = readl(geni->base + SE_IRQ_EN); + val |= GENI_M_IRQ_EN | GENI_S_IRQ_EN; + writel(val, geni->base + SE_IRQ_EN); + + val = readl(geni->base + SE_GENI_DMA_MODE_EN); + val &= ~GENI_DMA_MODE_EN; + writel(val, geni->base + SE_GENI_DMA_MODE_EN); + + writel(0, geni->base + SE_GSI_EVENT_EN); + + writel(tx_depth - 1, geni->base + SE_GENI_RX_WATERMARK_REG); + writel(tx_depth, geni->base + SE_GENI_RX_RFR_WATERMARK_REG); + + val = readl(geni->base + SE_GENI_M_IRQ_EN); + val |= M_COMMON_GENI_M_IRQ_EN; + val |= M_CMD_DONE_EN | M_TX_FIFO_WATERMARK_EN; + val |= M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN; + writel(val, geni->base + SE_GENI_M_IRQ_EN); + + val = readl(geni->base + SE_GENI_S_IRQ_EN); + val |= S_COMMON_GENI_S_IRQ_EN; + writel(val, geni->base + SE_GENI_S_IRQ_EN); +} + +static u32 geni_i2c_get_tx_fifo_depth(struct geni_i2c_priv *geni) +{ + u32 val, hw_version, hw_major, hw_minor, tx_fifo_depth_mask; + + hw_version = readl(geni->wrapper + QUP_HW_VER_REG); + hw_major = GENI_SE_VERSION_MAJOR(hw_version); + hw_minor = GENI_SE_VERSION_MINOR(hw_version); + + if ((hw_major == 3 && hw_minor >= 10) || hw_major > 3) + tx_fifo_depth_mask = TX_FIFO_DEPTH_MSK_256_BYTES; + else + tx_fifo_depth_mask = TX_FIFO_DEPTH_MSK; + + val = readl(geni->base + SE_HW_PARAM_0); + + return (val & tx_fifo_depth_mask) >> TX_FIFO_DEPTH_SHFT; +} + +static int geni_i2c_probe(struct udevice *dev) +{ + ofnode parent_node = ofnode_get_parent(dev_ofnode(dev)); + struct geni_i2c_priv *geni = dev_get_priv(dev); + u32 proto, tx_depth, fifo_disable; + int ret; + + geni->is_master_hub = dev_get_driver_data(dev) & GENI_I2C_IS_MASTER_HUB; + + geni->wrapper = ofnode_get_addr(parent_node); + if (geni->wrapper == FDT_ADDR_T_NONE) + return -EINVAL; + + geni->base = (phys_addr_t)dev_read_addr_ptr(dev); + if (!geni->base) + return -EINVAL; + + if (geni->is_master_hub) { + ret = clk_get_by_name(dev, "core", &geni->core); + if (ret) { + pr_err("clk_get_by_name(core) failed: %d\n", ret); + return ret; + } + } + + ret = clk_get_by_name(dev, "se", &geni->se); + if (ret) { + pr_err("clk_get_by_name(iface) failed: %d\n", ret); + return ret; + } + + geni_i2c_enable_clocks(dev, geni); + + proto = readl(geni->base + GENI_FW_REVISION_RO); + proto &= FW_REV_PROTOCOL_MSK; + proto >>= FW_REV_PROTOCOL_SHFT; + + if (proto != GENI_SE_I2C) { + pr_err("%s: Invalid proto %d\n", __func__, proto); + geni_i2c_disable_clocks(dev, geni); + return -ENXIO; + } + + fifo_disable = readl(geni->base + GENI_IF_DISABLE_RO) & FIFO_IF_DISABLE; + if (fifo_disable) { + geni_i2c_disable_clocks(dev, geni); + pr_err("%s: FIFO mode disabled, DMA mode unsupported\n", __func__); + return -ENXIO; + } + + if (!geni->is_master_hub) { + tx_depth = geni_i2c_get_tx_fifo_depth(geni); + if (!tx_depth) { + geni_i2c_disable_clocks(dev, geni); + pr_err("%s: Invalid TX FIFO depth\n", __func__); + return -ENXIO; + } + } else { + tx_depth = 16; + } + geni->tx_wm = tx_depth - 1; + + geni_i2c_init(geni, tx_depth); + geni_i2c_config_packing(geni, BITS_PER_BYTE, + PACKING_BYTES_PW, true, true, true); + + /* Setup for standard rate */ + return geni_i2c_clk_map_idx(geni, I2C_SPEED_STANDARD_RATE); +} + +static int geni_i2c_set_bus_speed(struct udevice *dev, unsigned int clk_freq) +{ + struct geni_i2c_priv *geni = dev_get_priv(dev); + + return geni_i2c_clk_map_idx(geni, clk_freq); +} + +static const struct dm_i2c_ops geni_i2c_ops = { + .xfer = geni_i2c_xfer, + .set_bus_speed = geni_i2c_set_bus_speed, +}; + +static const struct udevice_id geni_i2c_ids[] = { + { .compatible = "qcom,geni-i2c" }, + { .compatible = "qcom,geni-i2c-master-hub", .data = GENI_I2C_IS_MASTER_HUB}, + {} +}; + +U_BOOT_DRIVER(i2c_geni) = { + .name = "i2c_geni", + .id = UCLASS_I2C, + .of_match = geni_i2c_ids, + .probe = geni_i2c_probe, + .priv_auto = sizeof(struct geni_i2c_priv), + .ops = &geni_i2c_ops, +}; + +static const struct udevice_id geni_i2c_master_hub_ids[] = { + { .compatible = "qcom,geni-se-i2c-master-hub" }, + { } +}; + +U_BOOT_DRIVER(geni_i2c_master_hub) = { + .name = "geni-se-master-hub", + .id = UCLASS_NOP, + .of_match = geni_i2c_master_hub_ids, + .bind = dm_scan_fdt_dev, + .flags = DM_FLAG_PRE_RELOC | DM_FLAG_DEFAULT_PD_CTRL_OFF, +}; diff --git a/include/soc/qcom/geni-se.h b/include/soc/qcom/geni-se.h new file mode 100644 index 00000000000..698a9256d26 --- /dev/null +++ b/include/soc/qcom/geni-se.h @@ -0,0 +1,265 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. + */ + +#ifndef _QCOM_GENI_SE +#define _QCOM_GENI_SE + +/* Protocols supported by GENI Serial Engines */ +enum geni_se_protocol_type { + GENI_SE_NONE, + GENI_SE_SPI, + GENI_SE_UART, + GENI_SE_I2C, + GENI_SE_I3C, + GENI_SE_SPI_SLAVE, +}; + +#define QUP_HW_VER_REG 0x4 + +/* Common SE registers */ +#define GENI_INIT_CFG_REVISION 0x0 +#define GENI_S_INIT_CFG_REVISION 0x4 +#define GENI_FORCE_DEFAULT_REG 0x20 +#define GENI_OUTPUT_CTRL 0x24 +#define GENI_CGC_CTRL 0x28 +#define SE_GENI_STATUS 0x40 +#define GENI_SER_M_CLK_CFG 0x48 +#define GENI_SER_S_CLK_CFG 0x4c +#define GENI_IF_DISABLE_RO 0x64 +#define GENI_FW_REVISION_RO 0x68 +#define SE_GENI_CLK_SEL 0x7c +#define SE_GENI_CFG_SEQ_START 0x84 +#define SE_GENI_BYTE_GRAN 0x254 +#define SE_GENI_DMA_MODE_EN 0x258 +#define SE_GENI_TX_PACKING_CFG0 0x260 +#define SE_GENI_TX_PACKING_CFG1 0x264 +#define SE_GENI_RX_PACKING_CFG0 0x284 +#define SE_GENI_RX_PACKING_CFG1 0x288 +#define SE_GENI_M_CMD0 0x600 +#define SE_GENI_M_CMD_CTRL_REG 0x604 +#define SE_GENI_M_IRQ_STATUS 0x610 +#define SE_GENI_M_IRQ_EN 0x614 +#define SE_GENI_M_IRQ_CLEAR 0x618 +#define SE_GENI_S_CMD0 0x630 +#define SE_GENI_S_CMD_CTRL_REG 0x634 +#define SE_GENI_S_IRQ_STATUS 0x640 +#define SE_GENI_S_IRQ_EN 0x644 +#define SE_GENI_S_IRQ_CLEAR 0x648 +#define SE_GENI_TX_FIFOn 0x700 +#define SE_GENI_RX_FIFOn 0x780 +#define SE_GENI_TX_FIFO_STATUS 0x800 +#define SE_GENI_RX_FIFO_STATUS 0x804 +#define SE_GENI_TX_WATERMARK_REG 0x80c +#define SE_GENI_RX_WATERMARK_REG 0x810 +#define SE_GENI_RX_RFR_WATERMARK_REG 0x814 +#define SE_GENI_IOS 0x908 +#define SE_DMA_TX_IRQ_STAT 0xc40 +#define SE_DMA_TX_IRQ_CLR 0xc44 +#define SE_DMA_TX_FSM_RST 0xc58 +#define SE_DMA_RX_IRQ_STAT 0xd40 +#define SE_DMA_RX_IRQ_CLR 0xd44 +#define SE_DMA_RX_LEN_IN 0xd54 +#define SE_DMA_RX_FSM_RST 0xd58 +#define SE_GSI_EVENT_EN 0xe18 +#define SE_IRQ_EN 0xe1c +#define SE_HW_PARAM_0 0xe24 +#define SE_HW_PARAM_1 0xe28 + +/* GENI_FORCE_DEFAULT_REG fields */ +#define FORCE_DEFAULT BIT(0) + +/* GENI_OUTPUT_CTRL fields */ +#define GENI_IO_MUX_0_EN BIT(0) +#define DEFAULT_IO_OUTPUT_CTRL_MSK GENMASK(6, 0) + +/* GENI_CGC_CTRL fields */ +#define CFG_AHB_CLK_CGC_ON BIT(0) +#define CFG_AHB_WR_ACLK_CGC_ON BIT(1) +#define DATA_AHB_CLK_CGC_ON BIT(2) +#define SCLK_CGC_ON BIT(3) +#define TX_CLK_CGC_ON BIT(4) +#define RX_CLK_CGC_ON BIT(5) +#define EXT_CLK_CGC_ON BIT(6) +#define PROG_RAM_HCLK_OFF BIT(8) +#define PROG_RAM_SCLK_OFF BIT(9) +#define DEFAULT_CGC_EN GENMASK(6, 0) + +/* GENI_STATUS fields */ +#define M_GENI_CMD_ACTIVE BIT(0) +#define S_GENI_CMD_ACTIVE BIT(12) + +/* GENI_SER_M_CLK_CFG/GENI_SER_S_CLK_CFG */ +#define SER_CLK_EN BIT(0) +#define CLK_DIV_MSK GENMASK(15, 4) +#define CLK_DIV_SHFT 4 + +/* GENI_IF_DISABLE_RO fields */ +#define FIFO_IF_DISABLE (BIT(0)) + +/* GENI_FW_REVISION_RO fields */ +#define FW_REV_PROTOCOL_MSK GENMASK(15, 8) +#define FW_REV_PROTOCOL_SHFT 8 + +/* GENI_CLK_SEL fields */ +#define CLK_SEL_MSK GENMASK(2, 0) + +/* SE_GENI_CFG_SEQ_START fields */ +#define START_TRIGGER BIT(0) + +/* SE_IRQ_EN fields */ +#define DMA_RX_IRQ_EN BIT(0) +#define DMA_TX_IRQ_EN BIT(1) +#define GENI_M_IRQ_EN BIT(2) +#define GENI_S_IRQ_EN BIT(3) + +/* SE_GENI_DMA_MODE_EN */ +#define GENI_DMA_MODE_EN BIT(0) + +/* GENI_M_CMD0 fields */ +#define M_OPCODE_MSK GENMASK(31, 27) +#define M_OPCODE_SHFT 27 +#define M_PARAMS_MSK GENMASK(26, 0) + +/* GENI_M_CMD_CTRL_REG */ +#define M_GENI_CMD_CANCEL BIT(2) +#define M_GENI_CMD_ABORT BIT(1) +#define M_GENI_DISABLE BIT(0) + +/* GENI_S_CMD0 fields */ +#define S_OPCODE_MSK GENMASK(31, 27) +#define S_OPCODE_SHFT 27 +#define S_PARAMS_MSK GENMASK(26, 0) + +/* GENI_S_CMD_CTRL_REG */ +#define S_GENI_CMD_CANCEL BIT(2) +#define S_GENI_CMD_ABORT BIT(1) +#define S_GENI_DISABLE BIT(0) + +/* GENI_M_IRQ_EN fields */ +#define M_CMD_DONE_EN BIT(0) +#define M_CMD_OVERRUN_EN BIT(1) +#define M_ILLEGAL_CMD_EN BIT(2) +#define M_CMD_FAILURE_EN BIT(3) +#define M_CMD_CANCEL_EN BIT(4) +#define M_CMD_ABORT_EN BIT(5) +#define M_TIMESTAMP_EN BIT(6) +#define M_RX_IRQ_EN BIT(7) +#define M_GP_SYNC_IRQ_0_EN BIT(8) +#define M_GP_IRQ_0_EN BIT(9) +#define M_GP_IRQ_1_EN BIT(10) +#define M_GP_IRQ_2_EN BIT(11) +#define M_GP_IRQ_3_EN BIT(12) +#define M_GP_IRQ_4_EN BIT(13) +#define M_GP_IRQ_5_EN BIT(14) +#define M_TX_FIFO_NOT_EMPTY_EN BIT(21) +#define M_IO_DATA_DEASSERT_EN BIT(22) +#define M_IO_DATA_ASSERT_EN BIT(23) +#define M_RX_FIFO_RD_ERR_EN BIT(24) +#define M_RX_FIFO_WR_ERR_EN BIT(25) +#define M_RX_FIFO_WATERMARK_EN BIT(26) +#define M_RX_FIFO_LAST_EN BIT(27) +#define M_TX_FIFO_RD_ERR_EN BIT(28) +#define M_TX_FIFO_WR_ERR_EN BIT(29) +#define M_TX_FIFO_WATERMARK_EN BIT(30) +#define M_SEC_IRQ_EN BIT(31) +#define M_COMMON_GENI_M_IRQ_EN (GENMASK(6, 1) | \ + M_IO_DATA_DEASSERT_EN | \ + M_IO_DATA_ASSERT_EN | M_RX_FIFO_RD_ERR_EN | \ + M_RX_FIFO_WR_ERR_EN | M_TX_FIFO_RD_ERR_EN | \ + M_TX_FIFO_WR_ERR_EN) + +/* GENI_S_IRQ_EN fields */ +#define S_CMD_DONE_EN BIT(0) +#define S_CMD_OVERRUN_EN BIT(1) +#define S_ILLEGAL_CMD_EN BIT(2) +#define S_CMD_FAILURE_EN BIT(3) +#define S_CMD_CANCEL_EN BIT(4) +#define S_CMD_ABORT_EN BIT(5) +#define S_GP_SYNC_IRQ_0_EN BIT(8) +#define S_GP_IRQ_0_EN BIT(9) +#define S_GP_IRQ_1_EN BIT(10) +#define S_GP_IRQ_2_EN BIT(11) +#define S_GP_IRQ_3_EN BIT(12) +#define S_GP_IRQ_4_EN BIT(13) +#define S_GP_IRQ_5_EN BIT(14) +#define S_IO_DATA_DEASSERT_EN BIT(22) +#define S_IO_DATA_ASSERT_EN BIT(23) +#define S_RX_FIFO_RD_ERR_EN BIT(24) +#define S_RX_FIFO_WR_ERR_EN BIT(25) +#define S_RX_FIFO_WATERMARK_EN BIT(26) +#define S_RX_FIFO_LAST_EN BIT(27) +#define S_COMMON_GENI_S_IRQ_EN (GENMASK(5, 1) | GENMASK(13, 9) | \ + S_RX_FIFO_RD_ERR_EN | S_RX_FIFO_WR_ERR_EN) + +/* GENI_/TX/RX/RX_RFR/_WATERMARK_REG fields */ +#define WATERMARK_MSK GENMASK(5, 0) + +/* GENI_TX_FIFO_STATUS fields */ +#define TX_FIFO_WC GENMASK(27, 0) + +/* GENI_RX_FIFO_STATUS fields */ +#define RX_LAST BIT(31) +#define RX_LAST_BYTE_VALID_MSK GENMASK(30, 28) +#define RX_LAST_BYTE_VALID_SHFT 28 +#define RX_FIFO_WC_MSK GENMASK(24, 0) + +/* SE_GENI_IOS fields */ +#define IO2_DATA_IN BIT(1) +#define RX_DATA_IN BIT(0) + +/* SE_DMA_TX_IRQ_STAT Register fields */ +#define TX_DMA_DONE BIT(0) +#define TX_EOT BIT(1) +#define TX_SBE BIT(2) +#define TX_RESET_DONE BIT(3) + +/* SE_DMA_RX_IRQ_STAT Register fields */ +#define RX_DMA_DONE BIT(0) +#define RX_EOT BIT(1) +#define RX_SBE BIT(2) +#define RX_RESET_DONE BIT(3) +#define RX_FLUSH_DONE BIT(4) +#define RX_DMA_PARITY_ERR BIT(5) +#define RX_DMA_BREAK GENMASK(8, 7) +#define RX_GENI_GP_IRQ GENMASK(10, 5) +#define RX_GENI_CANCEL_IRQ BIT(11) +#define RX_GENI_GP_IRQ_EXT GENMASK(13, 12) + +/* SE_HW_PARAM_0 fields */ +#define TX_FIFO_WIDTH_MSK GENMASK(29, 24) +#define TX_FIFO_WIDTH_SHFT 24 +/* + * For QUP HW Version >= 3.10 Tx fifo depth support is increased + * to 256bytes and corresponding bits are 16 to 23 + */ +#define TX_FIFO_DEPTH_MSK_256_BYTES GENMASK(23, 16) +#define TX_FIFO_DEPTH_MSK GENMASK(21, 16) +#define TX_FIFO_DEPTH_SHFT 16 + +/* SE_HW_PARAM_1 fields */ +#define RX_FIFO_WIDTH_MSK GENMASK(29, 24) +#define RX_FIFO_WIDTH_SHFT 24 +/* + * For QUP HW Version >= 3.10 Rx fifo depth support is increased + * to 256bytes and corresponding bits are 16 to 23 + */ +#define RX_FIFO_DEPTH_MSK_256_BYTES GENMASK(23, 16) +#define RX_FIFO_DEPTH_MSK GENMASK(21, 16) +#define RX_FIFO_DEPTH_SHFT 16 + +#define HW_VER_MAJOR_MASK GENMASK(31, 28) +#define HW_VER_MAJOR_SHFT 28 +#define HW_VER_MINOR_MASK GENMASK(27, 16) +#define HW_VER_MINOR_SHFT 16 +#define HW_VER_STEP_MASK GENMASK(15, 0) + +#define GENI_SE_VERSION_MAJOR(ver) ((ver & HW_VER_MAJOR_MASK) >> HW_VER_MAJOR_SHFT) +#define GENI_SE_VERSION_MINOR(ver) ((ver & HW_VER_MINOR_MASK) >> HW_VER_MINOR_SHFT) +#define GENI_SE_VERSION_STEP(ver) (ver & HW_VER_STEP_MASK) + +/* QUP SE VERSION value for major number 2 and minor number 5 */ +#define QUP_SE_VERSION_2_5 0x20050000 + +#endif
Add Support for the Qualcomm Generic Interface (GENI) I2C interface found on newer Qualcomm SoCs. The Generic Interface (GENI) is a firmware based Qualcomm Universal Peripherals (QUP) Serial Engine (SE) Wrapper which can support multiple bus protocols depending on the firmware type loaded at early boot time based on system configuration. It also supports the "I2C Master Hub" which is a single function Wrapper that only FIFO mode I2C. It replaces the fixed-function QUP Wrapper found on older SoCs. The geni-se.h containing the generic GENI Serial Engine registers defines is imported from Linux. Only FIFO mode is implemented, nor SE DMA nor GPI DMA is implemented. Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> --- drivers/i2c/Kconfig | 10 + drivers/i2c/Makefile | 1 + drivers/i2c/geni_i2c.c | 576 +++++++++++++++++++++++++++++++++++++++++++++ include/soc/qcom/geni-se.h | 265 +++++++++++++++++++++ 4 files changed, 852 insertions(+)