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pharaoh.lmichel.fr Received-SPF: pass client-ip=149.202.28.74; envelope-from=luc@lmichel.fr; helo=pharaoh.lmichel.fr X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/10 07:32:09 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Luc Michel , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Andrew Baumann , Paul Zimmerman , Niek Linnenbank , qemu-arm@nongnu.org, Havard Skinnemoen Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" There are 5 PLLs in the CPRMAN, namely PLL A, C, D, H and B. All of them take the xosc clock as input and produce a new clock. This commit adds a skeleton implementation for the PLLs as sub-devices of the CPRMAN. The PLLs are instantiated and connected internally to the main oscillator. Each PLL has 6 registers : CM, A2W_CTRL, A2W_ANA[0,1,2,3], A2W_FRAC. A write to any of them triggers a call to the (not yet implemented) pll_update function. If the main oscillator changes frequency, an update is also triggered. Reviewed-by: Philippe Mathieu-Daudé Tested-by: Philippe Mathieu-Daudé Signed-off-by: Luc Michel --- include/hw/misc/bcm2835_cprman.h | 29 +++++ include/hw/misc/bcm2835_cprman_internals.h | 144 +++++++++++++++++++++ hw/misc/bcm2835_cprman.c | 108 ++++++++++++++++ 3 files changed, 281 insertions(+) diff --git a/include/hw/misc/bcm2835_cprman.h b/include/hw/misc/bcm2835_cprman.h index 8ae2d4d17c..5c442e6ff9 100644 --- a/include/hw/misc/bcm2835_cprman.h +++ b/include/hw/misc/bcm2835_cprman.h @@ -19,17 +19,46 @@ typedef struct BCM2835CprmanState BCM2835CprmanState; DECLARE_INSTANCE_CHECKER(BCM2835CprmanState, CPRMAN, TYPE_BCM2835_CPRMAN) #define CPRMAN_NUM_REGS (0x2000 / sizeof(uint32_t)) +typedef enum CprmanPll { + CPRMAN_PLLA = 0, + CPRMAN_PLLC, + CPRMAN_PLLD, + CPRMAN_PLLH, + CPRMAN_PLLB, + + CPRMAN_NUM_PLL +} CprmanPll; + +typedef struct CprmanPllState { + /*< private >*/ + DeviceState parent_obj; + + /*< public >*/ + CprmanPll id; + + uint32_t *reg_cm; + uint32_t *reg_a2w_ctrl; + uint32_t *reg_a2w_ana; /* ANA[0] .. ANA[3] */ + uint32_t prediv_mask; /* prediv bit in ana[1] */ + uint32_t *reg_a2w_frac; + + Clock *xosc_in; + Clock *out; +} CprmanPllState; + struct BCM2835CprmanState { /*< private >*/ SysBusDevice parent_obj; /*< public >*/ MemoryRegion iomem; + CprmanPllState plls[CPRMAN_NUM_PLL]; + uint32_t regs[CPRMAN_NUM_REGS]; uint32_t xosc_freq; Clock *xosc; }; diff --git a/include/hw/misc/bcm2835_cprman_internals.h b/include/hw/misc/bcm2835_cprman_internals.h index 8fcc6d1d09..340ad623bb 100644 --- a/include/hw/misc/bcm2835_cprman_internals.h +++ b/include/hw/misc/bcm2835_cprman_internals.h @@ -10,15 +10,159 @@ #define HW_MISC_CPRMAN_INTERNALS_H #include "hw/registerfields.h" #include "hw/misc/bcm2835_cprman.h" +#define TYPE_CPRMAN_PLL "bcm2835-cprman-pll" + +DECLARE_INSTANCE_CHECKER(CprmanPllState, CPRMAN_PLL, + TYPE_CPRMAN_PLL) + /* Register map */ +/* PLLs */ +REG32(CM_PLLA, 0x104) + FIELD(CM_PLLA, LOADDSI0, 0, 1) + FIELD(CM_PLLA, HOLDDSI0, 1, 1) + FIELD(CM_PLLA, LOADCCP2, 2, 1) + FIELD(CM_PLLA, HOLDCCP2, 3, 1) + FIELD(CM_PLLA, LOADCORE, 4, 1) + FIELD(CM_PLLA, HOLDCORE, 5, 1) + FIELD(CM_PLLA, LOADPER, 6, 1) + FIELD(CM_PLLA, HOLDPER, 7, 1) + FIELD(CM_PLLx, ANARST, 8, 1) +REG32(CM_PLLC, 0x108) + FIELD(CM_PLLC, LOADCORE0, 0, 1) + FIELD(CM_PLLC, HOLDCORE0, 1, 1) + FIELD(CM_PLLC, LOADCORE1, 2, 1) + FIELD(CM_PLLC, HOLDCORE1, 3, 1) + FIELD(CM_PLLC, LOADCORE2, 4, 1) + FIELD(CM_PLLC, HOLDCORE2, 5, 1) + FIELD(CM_PLLC, LOADPER, 6, 1) + FIELD(CM_PLLC, HOLDPER, 7, 1) +REG32(CM_PLLD, 0x10c) + FIELD(CM_PLLD, LOADDSI0, 0, 1) + FIELD(CM_PLLD, HOLDDSI0, 1, 1) + FIELD(CM_PLLD, LOADDSI1, 2, 1) + FIELD(CM_PLLD, HOLDDSI1, 3, 1) + FIELD(CM_PLLD, LOADCORE, 4, 1) + FIELD(CM_PLLD, HOLDCORE, 5, 1) + FIELD(CM_PLLD, LOADPER, 6, 1) + FIELD(CM_PLLD, HOLDPER, 7, 1) +REG32(CM_PLLH, 0x110) + FIELD(CM_PLLH, LOADPIX, 0, 1) + FIELD(CM_PLLH, LOADAUX, 1, 1) + FIELD(CM_PLLH, LOADRCAL, 2, 1) +REG32(CM_PLLB, 0x170) + FIELD(CM_PLLB, LOADARM, 0, 1) + FIELD(CM_PLLB, HOLDARM, 1, 1) + +REG32(A2W_PLLA_CTRL, 0x1100) + FIELD(A2W_PLLx_CTRL, NDIV, 0, 10) + FIELD(A2W_PLLx_CTRL, PDIV, 12, 3) + FIELD(A2W_PLLx_CTRL, PWRDN, 16, 1) + FIELD(A2W_PLLx_CTRL, PRST_DISABLE, 17, 1) +REG32(A2W_PLLC_CTRL, 0x1120) +REG32(A2W_PLLD_CTRL, 0x1140) +REG32(A2W_PLLH_CTRL, 0x1160) +REG32(A2W_PLLB_CTRL, 0x11e0) + +REG32(A2W_PLLA_ANA0, 0x1010) +REG32(A2W_PLLA_ANA1, 0x1014) + FIELD(A2W_PLLx_ANA1, FB_PREDIV, 14, 1) +REG32(A2W_PLLA_ANA2, 0x1018) +REG32(A2W_PLLA_ANA3, 0x101c) + +REG32(A2W_PLLC_ANA0, 0x1030) +REG32(A2W_PLLC_ANA1, 0x1034) +REG32(A2W_PLLC_ANA2, 0x1038) +REG32(A2W_PLLC_ANA3, 0x103c) + +REG32(A2W_PLLD_ANA0, 0x1050) +REG32(A2W_PLLD_ANA1, 0x1054) +REG32(A2W_PLLD_ANA2, 0x1058) +REG32(A2W_PLLD_ANA3, 0x105c) + +REG32(A2W_PLLH_ANA0, 0x1070) +REG32(A2W_PLLH_ANA1, 0x1074) + FIELD(A2W_PLLH_ANA1, FB_PREDIV, 11, 1) +REG32(A2W_PLLH_ANA2, 0x1078) +REG32(A2W_PLLH_ANA3, 0x107c) + +REG32(A2W_PLLB_ANA0, 0x10f0) +REG32(A2W_PLLB_ANA1, 0x10f4) +REG32(A2W_PLLB_ANA2, 0x10f8) +REG32(A2W_PLLB_ANA3, 0x10fc) + +REG32(A2W_PLLA_FRAC, 0x1200) + FIELD(A2W_PLLx_FRAC, FRAC, 0, 20) +REG32(A2W_PLLC_FRAC, 0x1220) +REG32(A2W_PLLD_FRAC, 0x1240) +REG32(A2W_PLLH_FRAC, 0x1260) +REG32(A2W_PLLB_FRAC, 0x12e0) + /* * This field is common to all registers. Each register write value must match * the CPRMAN_PASSWORD magic value in its 8 MSB. */ FIELD(CPRMAN, PASSWORD, 24, 8) #define CPRMAN_PASSWORD 0x5a +/* PLL init info */ +typedef struct PLLInitInfo { + const char *name; + size_t cm_offset; + size_t a2w_ctrl_offset; + size_t a2w_ana_offset; + uint32_t prediv_mask; /* Prediv bit in ana[1] */ + size_t a2w_frac_offset; +} PLLInitInfo; + +#define FILL_PLL_INIT_INFO(pll_) \ + .cm_offset = R_CM_ ## pll_, \ + .a2w_ctrl_offset = R_A2W_ ## pll_ ## _CTRL, \ + .a2w_ana_offset = R_A2W_ ## pll_ ## _ANA0, \ + .a2w_frac_offset = R_A2W_ ## pll_ ## _FRAC + +static const PLLInitInfo PLL_INIT_INFO[] = { + [CPRMAN_PLLA] = { + .name = "plla", + .prediv_mask = R_A2W_PLLx_ANA1_FB_PREDIV_MASK, + FILL_PLL_INIT_INFO(PLLA), + }, + [CPRMAN_PLLC] = { + .name = "pllc", + .prediv_mask = R_A2W_PLLx_ANA1_FB_PREDIV_MASK, + FILL_PLL_INIT_INFO(PLLC), + }, + [CPRMAN_PLLD] = { + .name = "plld", + .prediv_mask = R_A2W_PLLx_ANA1_FB_PREDIV_MASK, + FILL_PLL_INIT_INFO(PLLD), + }, + [CPRMAN_PLLH] = { + .name = "pllh", + .prediv_mask = R_A2W_PLLH_ANA1_FB_PREDIV_MASK, + FILL_PLL_INIT_INFO(PLLH), + }, + [CPRMAN_PLLB] = { + .name = "pllb", + .prediv_mask = R_A2W_PLLx_ANA1_FB_PREDIV_MASK, + FILL_PLL_INIT_INFO(PLLB), + }, +}; + +#undef FILL_PLL_CHANNEL_INIT_INFO + +static inline void set_pll_init_info(BCM2835CprmanState *s, + CprmanPllState *pll, + CprmanPll id) +{ + pll->id = id; + pll->reg_cm = &s->regs[PLL_INIT_INFO[id].cm_offset]; + pll->reg_a2w_ctrl = &s->regs[PLL_INIT_INFO[id].a2w_ctrl_offset]; + pll->reg_a2w_ana = &s->regs[PLL_INIT_INFO[id].a2w_ana_offset]; + pll->prediv_mask = PLL_INIT_INFO[id].prediv_mask; + pll->reg_a2w_frac = &s->regs[PLL_INIT_INFO[id].a2w_frac_offset]; +} + #endif diff --git a/hw/misc/bcm2835_cprman.c b/hw/misc/bcm2835_cprman.c index 57ab9910b5..b86f5901b8 100644 --- a/hw/misc/bcm2835_cprman.c +++ b/hw/misc/bcm2835_cprman.c @@ -46,10 +46,56 @@ #include "hw/qdev-properties.h" #include "hw/misc/bcm2835_cprman.h" #include "hw/misc/bcm2835_cprman_internals.h" #include "trace.h" +/* PLL */ + +static void pll_update(CprmanPllState *pll) +{ + clock_update(pll->out, 0); +} + +static void pll_xosc_update(void *opaque) +{ + pll_update(CPRMAN_PLL(opaque)); +} + +static void pll_init(Object *obj) +{ + CprmanPllState *s = CPRMAN_PLL(obj); + + s->xosc_in = qdev_init_clock_in(DEVICE(s), "xosc-in", pll_xosc_update, s); + s->out = qdev_init_clock_out(DEVICE(s), "out"); +} + +static const VMStateDescription pll_vmstate = { + .name = TYPE_CPRMAN_PLL, + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_CLOCK(xosc_in, CprmanPllState), + VMSTATE_END_OF_LIST() + } +}; + +static void pll_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->vmsd = &pll_vmstate; +} + +static const TypeInfo cprman_pll_info = { + .name = TYPE_CPRMAN_PLL, + .parent = TYPE_DEVICE, + .instance_size = sizeof(CprmanPllState), + .class_init = pll_class_init, + .instance_init = pll_init, +}; + + /* CPRMAN "top level" model */ static uint64_t cprman_read(void *opaque, hwaddr offset, unsigned size) { @@ -64,10 +110,19 @@ static uint64_t cprman_read(void *opaque, hwaddr offset, trace_bcm2835_cprman_read(offset, r); return r; } +#define CASE_PLL_REGS(pll_) \ + case R_CM_ ## pll_: \ + case R_A2W_ ## pll_ ## _CTRL: \ + case R_A2W_ ## pll_ ## _ANA0: \ + case R_A2W_ ## pll_ ## _ANA1: \ + case R_A2W_ ## pll_ ## _ANA2: \ + case R_A2W_ ## pll_ ## _ANA3: \ + case R_A2W_ ## pll_ ## _FRAC + static void cprman_write(void *opaque, hwaddr offset, uint64_t value, unsigned size) { BCM2835CprmanState *s = CPRMAN(opaque); size_t idx = offset / sizeof(uint32_t); @@ -80,12 +135,35 @@ static void cprman_write(void *opaque, hwaddr offset, value &= ~R_CPRMAN_PASSWORD_MASK; trace_bcm2835_cprman_write(offset, value); s->regs[idx] = value; + switch (idx) { + CASE_PLL_REGS(PLLA) : + pll_update(&s->plls[CPRMAN_PLLA]); + break; + + CASE_PLL_REGS(PLLC) : + pll_update(&s->plls[CPRMAN_PLLC]); + break; + + CASE_PLL_REGS(PLLD) : + pll_update(&s->plls[CPRMAN_PLLD]); + break; + + CASE_PLL_REGS(PLLH) : + pll_update(&s->plls[CPRMAN_PLLH]); + break; + + CASE_PLL_REGS(PLLB) : + pll_update(&s->plls[CPRMAN_PLLB]); + break; + } } +#undef CASE_PLL_REGS + static const MemoryRegionOps cprman_ops = { .read = cprman_read, .write = cprman_write, .endianness = DEVICE_LITTLE_ENDIAN, .valid = { @@ -104,27 +182,55 @@ static const MemoryRegionOps cprman_ops = { }; static void cprman_reset(DeviceState *dev) { BCM2835CprmanState *s = CPRMAN(dev); + size_t i; memset(s->regs, 0, sizeof(s->regs)); + for (i = 0; i < CPRMAN_NUM_PLL; i++) { + device_cold_reset(DEVICE(&s->plls[i])); + } + clock_update_hz(s->xosc, s->xosc_freq); } static void cprman_init(Object *obj) { BCM2835CprmanState *s = CPRMAN(obj); + size_t i; + + for (i = 0; i < CPRMAN_NUM_PLL; i++) { + object_initialize_child(obj, PLL_INIT_INFO[i].name, + &s->plls[i], TYPE_CPRMAN_PLL); + set_pll_init_info(s, &s->plls[i], i); + } s->xosc = clock_new(obj, "xosc"); memory_region_init_io(&s->iomem, obj, &cprman_ops, s, "bcm2835-cprman", 0x2000); sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->iomem); } +static void cprman_realize(DeviceState *dev, Error **errp) +{ + BCM2835CprmanState *s = CPRMAN(dev); + size_t i; + + for (i = 0; i < CPRMAN_NUM_PLL; i++) { + CprmanPllState *pll = &s->plls[i]; + + clock_set_source(pll->xosc_in, s->xosc); + + if (!qdev_realize(DEVICE(pll), NULL, errp)) { + return; + } + } +} + static const VMStateDescription cprman_vmstate = { .name = TYPE_BCM2835_CPRMAN, .version_id = 1, .minimum_version_id = 1, .fields = (VMStateField[]) { @@ -140,10 +246,11 @@ static Property cprman_properties[] = { static void cprman_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); + dc->realize = cprman_realize; dc->reset = cprman_reset; dc->vmsd = &cprman_vmstate; device_class_set_props(dc, cprman_properties); } @@ -156,8 +263,9 @@ static const TypeInfo cprman_info = { }; static void cprman_register_types(void) { type_register_static(&cprman_info); + type_register_static(&cprman_pll_info); } type_init(cprman_register_types);