diff options
Diffstat (limited to 'drivers/media/pci/intel/ipu6/ipu6-isys-dwc-phy.c')
-rw-r--r-- | drivers/media/pci/intel/ipu6/ipu6-isys-dwc-phy.c | 536 |
1 files changed, 536 insertions, 0 deletions
diff --git a/drivers/media/pci/intel/ipu6/ipu6-isys-dwc-phy.c b/drivers/media/pci/intel/ipu6/ipu6-isys-dwc-phy.c new file mode 100644 index 0000000000..1715275e67 --- /dev/null +++ b/drivers/media/pci/intel/ipu6/ipu6-isys-dwc-phy.c @@ -0,0 +1,536 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2013--2024 Intel Corporation + */ + +#include <linux/bitfield.h> +#include <linux/bits.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/iopoll.h> +#include <linux/math64.h> + +#include "ipu6-bus.h" +#include "ipu6-isys.h" +#include "ipu6-platform-isys-csi2-reg.h" + +#define IPU6_DWC_DPHY_BASE(i) (0x238038 + 0x34 * (i)) +#define IPU6_DWC_DPHY_RSTZ 0x00 +#define IPU6_DWC_DPHY_SHUTDOWNZ 0x04 +#define IPU6_DWC_DPHY_HSFREQRANGE 0x08 +#define IPU6_DWC_DPHY_CFGCLKFREQRANGE 0x0c +#define IPU6_DWC_DPHY_TEST_IFC_ACCESS_MODE 0x10 +#define IPU6_DWC_DPHY_TEST_IFC_REQ 0x14 +#define IPU6_DWC_DPHY_TEST_IFC_REQ_COMPLETION 0x18 +#define IPU6_DWC_DPHY_DFT_CTRL0 0x28 +#define IPU6_DWC_DPHY_DFT_CTRL1 0x2c +#define IPU6_DWC_DPHY_DFT_CTRL2 0x30 + +/* + * test IFC request definition: + * - req: 0 for read, 1 for write + * - 12 bits address + * - 8bits data (will ignore for read) + * --24----16------4-----0 + * --|-data-|-addr-|-req-| + */ +#define IFC_REQ(req, addr, data) (FIELD_PREP(GENMASK(23, 16), data) | \ + FIELD_PREP(GENMASK(15, 4), addr) | \ + FIELD_PREP(GENMASK(1, 0), req)) + +#define TEST_IFC_REQ_READ 0 +#define TEST_IFC_REQ_WRITE 1 +#define TEST_IFC_REQ_RESET 2 + +#define TEST_IFC_ACCESS_MODE_FSM 0 +#define TEST_IFC_ACCESS_MODE_IFC_CTL 1 + +enum phy_fsm_state { + PHY_FSM_STATE_POWERON = 0, + PHY_FSM_STATE_BGPON = 1, + PHY_FSM_STATE_CAL_TYPE = 2, + PHY_FSM_STATE_BURNIN_CAL = 3, + PHY_FSM_STATE_TERMCAL = 4, + PHY_FSM_STATE_OFFSETCAL = 5, + PHY_FSM_STATE_OFFSET_LANE = 6, + PHY_FSM_STATE_IDLE = 7, + PHY_FSM_STATE_ULP = 8, + PHY_FSM_STATE_DDLTUNNING = 9, + PHY_FSM_STATE_SKEW_BACKWARD = 10, + PHY_FSM_STATE_INVALID, +}; + +static void dwc_dphy_write(struct ipu6_isys *isys, u32 phy_id, u32 addr, + u32 data) +{ + struct device *dev = &isys->adev->auxdev.dev; + void __iomem *isys_base = isys->pdata->base; + void __iomem *base = isys_base + IPU6_DWC_DPHY_BASE(phy_id); + + dev_dbg(dev, "write: reg 0x%lx = data 0x%x", base + addr - isys_base, + data); + writel(data, base + addr); +} + +static u32 dwc_dphy_read(struct ipu6_isys *isys, u32 phy_id, u32 addr) +{ + struct device *dev = &isys->adev->auxdev.dev; + void __iomem *isys_base = isys->pdata->base; + void __iomem *base = isys_base + IPU6_DWC_DPHY_BASE(phy_id); + u32 data; + + data = readl(base + addr); + dev_dbg(dev, "read: reg 0x%lx = data 0x%x", base + addr - isys_base, + data); + + return data; +} + +static void dwc_dphy_write_mask(struct ipu6_isys *isys, u32 phy_id, u32 addr, + u32 data, u8 shift, u8 width) +{ + u32 temp; + u32 mask; + + mask = (1 << width) - 1; + temp = dwc_dphy_read(isys, phy_id, addr); + temp &= ~(mask << shift); + temp |= (data & mask) << shift; + dwc_dphy_write(isys, phy_id, addr, temp); +} + +static u32 __maybe_unused dwc_dphy_read_mask(struct ipu6_isys *isys, u32 phy_id, + u32 addr, u8 shift, u8 width) +{ + u32 val; + + val = dwc_dphy_read(isys, phy_id, addr) >> shift; + return val & ((1 << width) - 1); +} + +#define DWC_DPHY_TIMEOUT (5 * USEC_PER_SEC) +static int dwc_dphy_ifc_read(struct ipu6_isys *isys, u32 phy_id, u32 addr, + u32 *val) +{ + struct device *dev = &isys->adev->auxdev.dev; + void __iomem *isys_base = isys->pdata->base; + void __iomem *base = isys_base + IPU6_DWC_DPHY_BASE(phy_id); + void __iomem *reg; + u32 completion; + int ret; + + dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_TEST_IFC_REQ, + IFC_REQ(TEST_IFC_REQ_READ, addr, 0)); + reg = base + IPU6_DWC_DPHY_TEST_IFC_REQ_COMPLETION; + ret = readl_poll_timeout(reg, completion, !(completion & BIT(0)), + 10, DWC_DPHY_TIMEOUT); + if (ret) { + dev_err(dev, "DWC ifc request read timeout\n"); + return ret; + } + + *val = completion >> 8 & 0xff; + *val = FIELD_GET(GENMASK(15, 8), completion); + dev_dbg(dev, "DWC ifc read 0x%x = 0x%x", addr, *val); + + return 0; +} + +static int dwc_dphy_ifc_write(struct ipu6_isys *isys, u32 phy_id, u32 addr, + u32 data) +{ + struct device *dev = &isys->adev->auxdev.dev; + void __iomem *isys_base = isys->pdata->base; + void __iomem *base = isys_base + IPU6_DWC_DPHY_BASE(phy_id); + void __iomem *reg; + u32 completion; + int ret; + + dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_TEST_IFC_REQ, + IFC_REQ(TEST_IFC_REQ_WRITE, addr, data)); + completion = readl(base + IPU6_DWC_DPHY_TEST_IFC_REQ_COMPLETION); + reg = base + IPU6_DWC_DPHY_TEST_IFC_REQ_COMPLETION; + ret = readl_poll_timeout(reg, completion, !(completion & BIT(0)), + 10, DWC_DPHY_TIMEOUT); + if (ret) + dev_err(dev, "DWC ifc request write timeout\n"); + + return ret; +} + +static void dwc_dphy_ifc_write_mask(struct ipu6_isys *isys, u32 phy_id, + u32 addr, u32 data, u8 shift, u8 width) +{ + u32 temp, mask; + int ret; + + ret = dwc_dphy_ifc_read(isys, phy_id, addr, &temp); + if (ret) + return; + + mask = (1 << width) - 1; + temp &= ~(mask << shift); + temp |= (data & mask) << shift; + dwc_dphy_ifc_write(isys, phy_id, addr, temp); +} + +static u32 dwc_dphy_ifc_read_mask(struct ipu6_isys *isys, u32 phy_id, u32 addr, + u8 shift, u8 width) +{ + int ret; + u32 val; + + ret = dwc_dphy_ifc_read(isys, phy_id, addr, &val); + if (ret) + return 0; + + return ((val >> shift) & ((1 << width) - 1)); +} + +static int dwc_dphy_pwr_up(struct ipu6_isys *isys, u32 phy_id) +{ + struct device *dev = &isys->adev->auxdev.dev; + u32 fsm_state; + int ret; + + dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_RSTZ, 1); + usleep_range(10, 20); + dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_SHUTDOWNZ, 1); + + ret = read_poll_timeout(dwc_dphy_ifc_read_mask, fsm_state, + (fsm_state == PHY_FSM_STATE_IDLE || + fsm_state == PHY_FSM_STATE_ULP), + 100, DWC_DPHY_TIMEOUT, false, isys, + phy_id, 0x1e, 0, 4); + + if (ret) + dev_err(dev, "Dphy %d power up failed, state 0x%x", phy_id, + fsm_state); + + return ret; +} + +struct dwc_dphy_freq_range { + u8 hsfreq; + u16 min; + u16 max; + u16 default_mbps; + u16 osc_freq_target; +}; + +#define DPHY_FREQ_RANGE_NUM (63) +#define DPHY_FREQ_RANGE_INVALID_INDEX (0xff) +static const struct dwc_dphy_freq_range freqranges[DPHY_FREQ_RANGE_NUM] = { + {0x00, 80, 97, 80, 335}, + {0x10, 80, 107, 90, 335}, + {0x20, 84, 118, 100, 335}, + {0x30, 93, 128, 110, 335}, + {0x01, 103, 139, 120, 335}, + {0x11, 112, 149, 130, 335}, + {0x21, 122, 160, 140, 335}, + {0x31, 131, 170, 150, 335}, + {0x02, 141, 181, 160, 335}, + {0x12, 150, 191, 170, 335}, + {0x22, 160, 202, 180, 335}, + {0x32, 169, 212, 190, 335}, + {0x03, 183, 228, 205, 335}, + {0x13, 198, 244, 220, 335}, + {0x23, 212, 259, 235, 335}, + {0x33, 226, 275, 250, 335}, + {0x04, 250, 301, 275, 335}, + {0x14, 274, 328, 300, 335}, + {0x25, 297, 354, 325, 335}, + {0x35, 321, 380, 350, 335}, + {0x05, 369, 433, 400, 335}, + {0x16, 416, 485, 450, 335}, + {0x26, 464, 538, 500, 335}, + {0x37, 511, 590, 550, 335}, + {0x07, 559, 643, 600, 335}, + {0x18, 606, 695, 650, 335}, + {0x28, 654, 748, 700, 335}, + {0x39, 701, 800, 750, 335}, + {0x09, 749, 853, 800, 335}, + {0x19, 796, 905, 850, 335}, + {0x29, 844, 958, 900, 335}, + {0x3a, 891, 1010, 950, 335}, + {0x0a, 939, 1063, 1000, 335}, + {0x1a, 986, 1115, 1050, 335}, + {0x2a, 1034, 1168, 1100, 335}, + {0x3b, 1081, 1220, 1150, 335}, + {0x0b, 1129, 1273, 1200, 335}, + {0x1b, 1176, 1325, 1250, 335}, + {0x2b, 1224, 1378, 1300, 335}, + {0x3c, 1271, 1430, 1350, 335}, + {0x0c, 1319, 1483, 1400, 335}, + {0x1c, 1366, 1535, 1450, 335}, + {0x2c, 1414, 1588, 1500, 335}, + {0x3d, 1461, 1640, 1550, 208}, + {0x0d, 1509, 1693, 1600, 214}, + {0x1d, 1556, 1745, 1650, 221}, + {0x2e, 1604, 1798, 1700, 228}, + {0x3e, 1651, 1850, 1750, 234}, + {0x0e, 1699, 1903, 1800, 241}, + {0x1e, 1746, 1955, 1850, 248}, + {0x2f, 1794, 2008, 1900, 255}, + {0x3f, 1841, 2060, 1950, 261}, + {0x0f, 1889, 2113, 2000, 268}, + {0x40, 1936, 2165, 2050, 275}, + {0x41, 1984, 2218, 2100, 281}, + {0x42, 2031, 2270, 2150, 288}, + {0x43, 2079, 2323, 2200, 294}, + {0x44, 2126, 2375, 2250, 302}, + {0x45, 2174, 2428, 2300, 308}, + {0x46, 2221, 2480, 2350, 315}, + {0x47, 2269, 2500, 2400, 321}, + {0x48, 2316, 2500, 2450, 328}, + {0x49, 2364, 2500, 2500, 335} +}; + +static u16 get_hsfreq_by_mbps(u32 mbps) +{ + unsigned int i = DPHY_FREQ_RANGE_NUM; + + while (i--) { + if (freqranges[i].default_mbps == mbps || + (mbps >= freqranges[i].min && mbps <= freqranges[i].max)) + return i; + } + + return DPHY_FREQ_RANGE_INVALID_INDEX; +} + +static int ipu6_isys_dwc_phy_config(struct ipu6_isys *isys, + u32 phy_id, u32 mbps) +{ + struct ipu6_bus_device *adev = isys->adev; + struct device *dev = &adev->auxdev.dev; + struct ipu6_device *isp = adev->isp; + u32 cfg_clk_freqrange; + u32 osc_freq_target; + u32 index; + + dev_dbg(dev, "config Dphy %u with %u mbps", phy_id, mbps); + + index = get_hsfreq_by_mbps(mbps); + if (index == DPHY_FREQ_RANGE_INVALID_INDEX) { + dev_err(dev, "link freq not found for mbps %u", mbps); + return -EINVAL; + } + + dwc_dphy_write_mask(isys, phy_id, IPU6_DWC_DPHY_HSFREQRANGE, + freqranges[index].hsfreq, 0, 7); + + /* Force termination Calibration */ + if (isys->phy_termcal_val) { + dwc_dphy_ifc_write_mask(isys, phy_id, 0x20a, 0x1, 0, 1); + dwc_dphy_ifc_write_mask(isys, phy_id, 0x209, 0x3, 0, 2); + dwc_dphy_ifc_write_mask(isys, phy_id, 0x209, + isys->phy_termcal_val, 4, 4); + } + + /* + * Enable override to configure the DDL target oscillation + * frequency on bit 0 of register 0xe4 + */ + dwc_dphy_ifc_write_mask(isys, phy_id, 0xe4, 0x1, 0, 1); + /* + * configure registers 0xe2, 0xe3 with the + * appropriate DDL target oscillation frequency + * 0x1cc(460) + */ + osc_freq_target = freqranges[index].osc_freq_target; + dwc_dphy_ifc_write_mask(isys, phy_id, 0xe2, + osc_freq_target & 0xff, 0, 8); + dwc_dphy_ifc_write_mask(isys, phy_id, 0xe3, + (osc_freq_target >> 8) & 0xf, 0, 4); + + if (mbps < 1500) { + /* deskew_polarity_rw, for < 1.5Gbps */ + dwc_dphy_ifc_write_mask(isys, phy_id, 0x8, 0x1, 5, 1); + } + + /* + * Set cfgclkfreqrange[5:0] = round[(Fcfg_clk(MHz)-17)*4] + * (38.4 - 17) * 4 = ~85 (0x55) + */ + cfg_clk_freqrange = (isp->buttress.ref_clk - 170) * 4 / 10; + dev_dbg(dev, "ref_clk = %u clk_freqrange = %u", + isp->buttress.ref_clk, cfg_clk_freqrange); + dwc_dphy_write_mask(isys, phy_id, IPU6_DWC_DPHY_CFGCLKFREQRANGE, + cfg_clk_freqrange, 0, 8); + + dwc_dphy_write_mask(isys, phy_id, IPU6_DWC_DPHY_DFT_CTRL2, 0x1, 4, 1); + dwc_dphy_write_mask(isys, phy_id, IPU6_DWC_DPHY_DFT_CTRL2, 0x1, 8, 1); + + return 0; +} + +static void ipu6_isys_dwc_phy_aggr_setup(struct ipu6_isys *isys, u32 master, + u32 slave, u32 mbps) +{ + /* Config mastermacro */ + dwc_dphy_ifc_write_mask(isys, master, 0x133, 0x1, 0, 1); + dwc_dphy_ifc_write_mask(isys, slave, 0x133, 0x0, 0, 1); + + /* Config master PHY clk lane to drive long channel clk */ + dwc_dphy_ifc_write_mask(isys, master, 0x307, 0x1, 2, 1); + dwc_dphy_ifc_write_mask(isys, slave, 0x307, 0x0, 2, 1); + + /* Config both PHYs data lanes to get clk from long channel */ + dwc_dphy_ifc_write_mask(isys, master, 0x508, 0x1, 5, 1); + dwc_dphy_ifc_write_mask(isys, slave, 0x508, 0x1, 5, 1); + dwc_dphy_ifc_write_mask(isys, master, 0x708, 0x1, 5, 1); + dwc_dphy_ifc_write_mask(isys, slave, 0x708, 0x1, 5, 1); + + /* Config slave PHY clk lane to bypass long channel clk to DDR clk */ + dwc_dphy_ifc_write_mask(isys, master, 0x308, 0x0, 3, 1); + dwc_dphy_ifc_write_mask(isys, slave, 0x308, 0x1, 3, 1); + + /* Override slave PHY clk lane enable (DPHYRXCLK_CLL_demux module) */ + dwc_dphy_ifc_write_mask(isys, slave, 0xe0, 0x3, 0, 2); + + /* Override slave PHY DDR clk lane enable (DPHYHSRX_div124 module) */ + dwc_dphy_ifc_write_mask(isys, slave, 0xe1, 0x1, 1, 1); + dwc_dphy_ifc_write_mask(isys, slave, 0x307, 0x1, 3, 1); + + /* Turn off slave PHY LP-RX clk lane */ + dwc_dphy_ifc_write_mask(isys, slave, 0x304, 0x1, 7, 1); + dwc_dphy_ifc_write_mask(isys, slave, 0x305, 0xa, 0, 5); +} + +#define PHY_E 4 +static int ipu6_isys_dwc_phy_powerup_ack(struct ipu6_isys *isys, u32 phy_id) +{ + struct device *dev = &isys->adev->auxdev.dev; + u32 rescal_done; + int ret; + + ret = dwc_dphy_pwr_up(isys, phy_id); + if (ret != 0) { + dev_err(dev, "Dphy %u power up failed(%d)", phy_id, ret); + return ret; + } + + /* reset forcerxmode */ + dwc_dphy_write_mask(isys, phy_id, IPU6_DWC_DPHY_DFT_CTRL2, 0, 4, 1); + dwc_dphy_write_mask(isys, phy_id, IPU6_DWC_DPHY_DFT_CTRL2, 0, 8, 1); + + dev_dbg(dev, "Dphy %u is ready!", phy_id); + + if (phy_id != PHY_E || isys->phy_termcal_val) + return 0; + + usleep_range(100, 200); + rescal_done = dwc_dphy_ifc_read_mask(isys, phy_id, 0x221, 7, 1); + if (rescal_done) { + isys->phy_termcal_val = dwc_dphy_ifc_read_mask(isys, phy_id, + 0x220, 2, 4); + dev_dbg(dev, "termcal done with value = %u", + isys->phy_termcal_val); + } + + return 0; +} + +static void ipu6_isys_dwc_phy_reset(struct ipu6_isys *isys, u32 phy_id) +{ + dev_dbg(&isys->adev->auxdev.dev, "Reset phy %u", phy_id); + + dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_SHUTDOWNZ, 0); + dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_RSTZ, 0); + dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_TEST_IFC_ACCESS_MODE, + TEST_IFC_ACCESS_MODE_FSM); + dwc_dphy_write(isys, phy_id, IPU6_DWC_DPHY_TEST_IFC_REQ, + TEST_IFC_REQ_RESET); +} + +int ipu6_isys_dwc_phy_set_power(struct ipu6_isys *isys, + struct ipu6_isys_csi2_config *cfg, + const struct ipu6_isys_csi2_timing *timing, + bool on) +{ + struct device *dev = &isys->adev->auxdev.dev; + void __iomem *isys_base = isys->pdata->base; + u32 phy_id, primary, secondary; + u32 nlanes, port, mbps; + s64 link_freq; + int ret; + + port = cfg->port; + + if (!isys_base || port >= isys->pdata->ipdata->csi2.nports) { + dev_warn(dev, "invalid port ID %d\n", port); + return -EINVAL; + } + + nlanes = cfg->nlanes; + /* only port 0, 2 and 4 support 4 lanes */ + if (nlanes == 4 && port % 2) { + dev_err(dev, "invalid csi-port %u with %u lanes\n", port, + nlanes); + return -EINVAL; + } + + link_freq = ipu6_isys_csi2_get_link_freq(&isys->csi2[port]); + if (link_freq < 0) { + dev_err(dev, "get link freq failed(%lld).\n", link_freq); + return link_freq; + } + + mbps = div_u64(link_freq, 500000); + + phy_id = port; + primary = port & ~1; + secondary = primary + 1; + if (on) { + if (nlanes == 4) { + dev_dbg(dev, "config phy %u and %u in aggr mode\n", + primary, secondary); + + ipu6_isys_dwc_phy_reset(isys, primary); + ipu6_isys_dwc_phy_reset(isys, secondary); + ipu6_isys_dwc_phy_aggr_setup(isys, primary, + secondary, mbps); + + ret = ipu6_isys_dwc_phy_config(isys, primary, mbps); + if (ret) + return ret; + ret = ipu6_isys_dwc_phy_config(isys, secondary, mbps); + if (ret) + return ret; + + ret = ipu6_isys_dwc_phy_powerup_ack(isys, primary); + if (ret) + return ret; + + ret = ipu6_isys_dwc_phy_powerup_ack(isys, secondary); + return ret; + } + + dev_dbg(dev, "config phy %u with %u lanes in non-aggr mode\n", + phy_id, nlanes); + + ipu6_isys_dwc_phy_reset(isys, phy_id); + ret = ipu6_isys_dwc_phy_config(isys, phy_id, mbps); + if (ret) + return ret; + + ret = ipu6_isys_dwc_phy_powerup_ack(isys, phy_id); + return ret; + } + + if (nlanes == 4) { + dev_dbg(dev, "Power down phy %u and phy %u for port %u\n", + primary, secondary, port); + ipu6_isys_dwc_phy_reset(isys, secondary); + ipu6_isys_dwc_phy_reset(isys, primary); + + return 0; + } + + dev_dbg(dev, "Powerdown phy %u with %u lanes\n", phy_id, nlanes); + + ipu6_isys_dwc_phy_reset(isys, phy_id); + + return 0; +} |