summaryrefslogtreecommitdiffstats
path: root/drivers/phy/rockchip/phy-rockchip-inno-dsidphy.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/phy/rockchip/phy-rockchip-inno-dsidphy.c')
-rw-r--r--drivers/phy/rockchip/phy-rockchip-inno-dsidphy.c793
1 files changed, 793 insertions, 0 deletions
diff --git a/drivers/phy/rockchip/phy-rockchip-inno-dsidphy.c b/drivers/phy/rockchip/phy-rockchip-inno-dsidphy.c
new file mode 100644
index 0000000000..6405943a26
--- /dev/null
+++ b/drivers/phy/rockchip/phy-rockchip-inno-dsidphy.c
@@ -0,0 +1,793 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 Rockchip Electronics Co. Ltd.
+ *
+ * Author: Wyon Bi <bivvy.bi@rock-chips.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/iopoll.h>
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/time64.h>
+
+#include <linux/phy/phy.h>
+#include <linux/phy/phy-mipi-dphy.h>
+
+#define UPDATE(x, h, l) (((x) << (l)) & GENMASK((h), (l)))
+
+/*
+ * The offset address[7:0] is distributed two parts, one from the bit7 to bit5
+ * is the first address, the other from the bit4 to bit0 is the second address.
+ * when you configure the registers, you must set both of them. The Clock Lane
+ * and Data Lane use the same registers with the same second address, but the
+ * first address is different.
+ */
+#define FIRST_ADDRESS(x) (((x) & 0x7) << 5)
+#define SECOND_ADDRESS(x) (((x) & 0x1f) << 0)
+#define PHY_REG(first, second) (FIRST_ADDRESS(first) | \
+ SECOND_ADDRESS(second))
+
+/* Analog Register Part: reg00 */
+#define BANDGAP_POWER_MASK BIT(7)
+#define BANDGAP_POWER_DOWN BIT(7)
+#define BANDGAP_POWER_ON 0
+#define LANE_EN_MASK GENMASK(6, 2)
+#define LANE_EN_CK BIT(6)
+#define LANE_EN_3 BIT(5)
+#define LANE_EN_2 BIT(4)
+#define LANE_EN_1 BIT(3)
+#define LANE_EN_0 BIT(2)
+#define POWER_WORK_MASK GENMASK(1, 0)
+#define POWER_WORK_ENABLE UPDATE(1, 1, 0)
+#define POWER_WORK_DISABLE UPDATE(2, 1, 0)
+/* Analog Register Part: reg01 */
+#define REG_SYNCRST_MASK BIT(2)
+#define REG_SYNCRST_RESET BIT(2)
+#define REG_SYNCRST_NORMAL 0
+#define REG_LDOPD_MASK BIT(1)
+#define REG_LDOPD_POWER_DOWN BIT(1)
+#define REG_LDOPD_POWER_ON 0
+#define REG_PLLPD_MASK BIT(0)
+#define REG_PLLPD_POWER_DOWN BIT(0)
+#define REG_PLLPD_POWER_ON 0
+/* Analog Register Part: reg03 */
+#define REG_FBDIV_HI_MASK BIT(5)
+#define REG_FBDIV_HI(x) UPDATE((x >> 8), 5, 5)
+#define REG_PREDIV_MASK GENMASK(4, 0)
+#define REG_PREDIV(x) UPDATE(x, 4, 0)
+/* Analog Register Part: reg04 */
+#define REG_FBDIV_LO_MASK GENMASK(7, 0)
+#define REG_FBDIV_LO(x) UPDATE(x, 7, 0)
+/* Analog Register Part: reg05 */
+#define SAMPLE_CLOCK_PHASE_MASK GENMASK(6, 4)
+#define SAMPLE_CLOCK_PHASE(x) UPDATE(x, 6, 4)
+#define CLOCK_LANE_SKEW_PHASE_MASK GENMASK(2, 0)
+#define CLOCK_LANE_SKEW_PHASE(x) UPDATE(x, 2, 0)
+/* Analog Register Part: reg06 */
+#define DATA_LANE_3_SKEW_PHASE_MASK GENMASK(6, 4)
+#define DATA_LANE_3_SKEW_PHASE(x) UPDATE(x, 6, 4)
+#define DATA_LANE_2_SKEW_PHASE_MASK GENMASK(2, 0)
+#define DATA_LANE_2_SKEW_PHASE(x) UPDATE(x, 2, 0)
+/* Analog Register Part: reg07 */
+#define DATA_LANE_1_SKEW_PHASE_MASK GENMASK(6, 4)
+#define DATA_LANE_1_SKEW_PHASE(x) UPDATE(x, 6, 4)
+#define DATA_LANE_0_SKEW_PHASE_MASK GENMASK(2, 0)
+#define DATA_LANE_0_SKEW_PHASE(x) UPDATE(x, 2, 0)
+/* Analog Register Part: reg08 */
+#define PLL_POST_DIV_ENABLE_MASK BIT(5)
+#define PLL_POST_DIV_ENABLE BIT(5)
+#define SAMPLE_CLOCK_DIRECTION_MASK BIT(4)
+#define SAMPLE_CLOCK_DIRECTION_REVERSE BIT(4)
+#define SAMPLE_CLOCK_DIRECTION_FORWARD 0
+#define LOWFRE_EN_MASK BIT(5)
+#define PLL_OUTPUT_FREQUENCY_DIV_BY_1 0
+#define PLL_OUTPUT_FREQUENCY_DIV_BY_2 1
+/* Analog Register Part: reg0b */
+#define CLOCK_LANE_VOD_RANGE_SET_MASK GENMASK(3, 0)
+#define CLOCK_LANE_VOD_RANGE_SET(x) UPDATE(x, 3, 0)
+#define VOD_MIN_RANGE 0x1
+#define VOD_MID_RANGE 0x3
+#define VOD_BIG_RANGE 0x7
+#define VOD_MAX_RANGE 0xf
+/* Analog Register Part: reg1E */
+#define PLL_MODE_SEL_MASK GENMASK(6, 5)
+#define PLL_MODE_SEL_LVDS_MODE 0
+#define PLL_MODE_SEL_MIPI_MODE BIT(5)
+/* Digital Register Part: reg00 */
+#define REG_DIG_RSTN_MASK BIT(0)
+#define REG_DIG_RSTN_NORMAL BIT(0)
+#define REG_DIG_RSTN_RESET 0
+/* Digital Register Part: reg01 */
+#define INVERT_TXCLKESC_MASK BIT(1)
+#define INVERT_TXCLKESC_ENABLE BIT(1)
+#define INVERT_TXCLKESC_DISABLE 0
+#define INVERT_TXBYTECLKHS_MASK BIT(0)
+#define INVERT_TXBYTECLKHS_ENABLE BIT(0)
+#define INVERT_TXBYTECLKHS_DISABLE 0
+/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg05 */
+#define T_LPX_CNT_MASK GENMASK(5, 0)
+#define T_LPX_CNT(x) UPDATE(x, 5, 0)
+/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg06 */
+#define T_HS_ZERO_CNT_HI_MASK BIT(7)
+#define T_HS_ZERO_CNT_HI(x) UPDATE(x, 7, 7)
+#define T_HS_PREPARE_CNT_MASK GENMASK(6, 0)
+#define T_HS_PREPARE_CNT(x) UPDATE(x, 6, 0)
+/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg07 */
+#define T_HS_ZERO_CNT_LO_MASK GENMASK(5, 0)
+#define T_HS_ZERO_CNT_LO(x) UPDATE(x, 5, 0)
+/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg08 */
+#define T_HS_TRAIL_CNT_MASK GENMASK(6, 0)
+#define T_HS_TRAIL_CNT(x) UPDATE(x, 6, 0)
+/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg09 */
+#define T_HS_EXIT_CNT_LO_MASK GENMASK(4, 0)
+#define T_HS_EXIT_CNT_LO(x) UPDATE(x, 4, 0)
+/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg0a */
+#define T_CLK_POST_CNT_LO_MASK GENMASK(3, 0)
+#define T_CLK_POST_CNT_LO(x) UPDATE(x, 3, 0)
+/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg0c */
+#define LPDT_TX_PPI_SYNC_MASK BIT(2)
+#define LPDT_TX_PPI_SYNC_ENABLE BIT(2)
+#define LPDT_TX_PPI_SYNC_DISABLE 0
+#define T_WAKEUP_CNT_HI_MASK GENMASK(1, 0)
+#define T_WAKEUP_CNT_HI(x) UPDATE(x, 1, 0)
+/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg0d */
+#define T_WAKEUP_CNT_LO_MASK GENMASK(7, 0)
+#define T_WAKEUP_CNT_LO(x) UPDATE(x, 7, 0)
+/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg0e */
+#define T_CLK_PRE_CNT_MASK GENMASK(3, 0)
+#define T_CLK_PRE_CNT(x) UPDATE(x, 3, 0)
+/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg10 */
+#define T_CLK_POST_CNT_HI_MASK GENMASK(7, 6)
+#define T_CLK_POST_CNT_HI(x) UPDATE(x, 7, 6)
+#define T_TA_GO_CNT_MASK GENMASK(5, 0)
+#define T_TA_GO_CNT(x) UPDATE(x, 5, 0)
+/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg11 */
+#define T_HS_EXIT_CNT_HI_MASK BIT(6)
+#define T_HS_EXIT_CNT_HI(x) UPDATE(x, 6, 6)
+#define T_TA_SURE_CNT_MASK GENMASK(5, 0)
+#define T_TA_SURE_CNT(x) UPDATE(x, 5, 0)
+/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg12 */
+#define T_TA_WAIT_CNT_MASK GENMASK(5, 0)
+#define T_TA_WAIT_CNT(x) UPDATE(x, 5, 0)
+/* LVDS Register Part: reg00 */
+#define LVDS_DIGITAL_INTERNAL_RESET_MASK BIT(2)
+#define LVDS_DIGITAL_INTERNAL_RESET_DISABLE BIT(2)
+#define LVDS_DIGITAL_INTERNAL_RESET_ENABLE 0
+/* LVDS Register Part: reg01 */
+#define LVDS_DIGITAL_INTERNAL_ENABLE_MASK BIT(7)
+#define LVDS_DIGITAL_INTERNAL_ENABLE BIT(7)
+#define LVDS_DIGITAL_INTERNAL_DISABLE 0
+/* LVDS Register Part: reg03 */
+#define MODE_ENABLE_MASK GENMASK(2, 0)
+#define TTL_MODE_ENABLE BIT(2)
+#define LVDS_MODE_ENABLE BIT(1)
+#define MIPI_MODE_ENABLE BIT(0)
+/* LVDS Register Part: reg0b */
+#define LVDS_LANE_EN_MASK GENMASK(7, 3)
+#define LVDS_DATA_LANE0_EN BIT(7)
+#define LVDS_DATA_LANE1_EN BIT(6)
+#define LVDS_DATA_LANE2_EN BIT(5)
+#define LVDS_DATA_LANE3_EN BIT(4)
+#define LVDS_CLK_LANE_EN BIT(3)
+#define LVDS_PLL_POWER_MASK BIT(2)
+#define LVDS_PLL_POWER_OFF BIT(2)
+#define LVDS_PLL_POWER_ON 0
+#define LVDS_BANDGAP_POWER_MASK BIT(0)
+#define LVDS_BANDGAP_POWER_DOWN BIT(0)
+#define LVDS_BANDGAP_POWER_ON 0
+
+#define DSI_PHY_RSTZ 0xa0
+#define PHY_ENABLECLK BIT(2)
+#define DSI_PHY_STATUS 0xb0
+#define PHY_LOCK BIT(0)
+
+enum phy_max_rate {
+ MAX_1GHZ,
+ MAX_2_5GHZ,
+};
+
+struct inno_video_phy_plat_data {
+ const struct inno_mipi_dphy_timing *inno_mipi_dphy_timing_table;
+ const unsigned int num_timings;
+ enum phy_max_rate max_rate;
+};
+
+struct inno_dsidphy {
+ struct device *dev;
+ struct clk *ref_clk;
+ struct clk *pclk_phy;
+ struct clk *pclk_host;
+ const struct inno_video_phy_plat_data *pdata;
+ void __iomem *phy_base;
+ void __iomem *host_base;
+ struct reset_control *rst;
+ enum phy_mode mode;
+ struct phy_configure_opts_mipi_dphy dphy_cfg;
+
+ struct clk *pll_clk;
+ struct {
+ struct clk_hw hw;
+ u8 prediv;
+ u16 fbdiv;
+ unsigned long rate;
+ } pll;
+};
+
+enum {
+ REGISTER_PART_ANALOG,
+ REGISTER_PART_DIGITAL,
+ REGISTER_PART_CLOCK_LANE,
+ REGISTER_PART_DATA0_LANE,
+ REGISTER_PART_DATA1_LANE,
+ REGISTER_PART_DATA2_LANE,
+ REGISTER_PART_DATA3_LANE,
+ REGISTER_PART_LVDS,
+};
+
+struct inno_mipi_dphy_timing {
+ unsigned long rate;
+ u8 lpx;
+ u8 hs_prepare;
+ u8 clk_lane_hs_zero;
+ u8 data_lane_hs_zero;
+ u8 hs_trail;
+};
+
+static const
+struct inno_mipi_dphy_timing inno_mipi_dphy_timing_table_max_1ghz[] = {
+ { 110000000, 0x0, 0x20, 0x16, 0x02, 0x22},
+ { 150000000, 0x0, 0x06, 0x16, 0x03, 0x45},
+ { 200000000, 0x0, 0x18, 0x17, 0x04, 0x0b},
+ { 250000000, 0x0, 0x05, 0x17, 0x05, 0x16},
+ { 300000000, 0x0, 0x51, 0x18, 0x06, 0x2c},
+ { 400000000, 0x0, 0x64, 0x19, 0x07, 0x33},
+ { 500000000, 0x0, 0x20, 0x1b, 0x07, 0x4e},
+ { 600000000, 0x0, 0x6a, 0x1d, 0x08, 0x3a},
+ { 700000000, 0x0, 0x3e, 0x1e, 0x08, 0x6a},
+ { 800000000, 0x0, 0x21, 0x1f, 0x09, 0x29},
+ {1000000000, 0x0, 0x09, 0x20, 0x09, 0x27},
+};
+
+static const
+struct inno_mipi_dphy_timing inno_mipi_dphy_timing_table_max_2_5ghz[] = {
+ { 110000000, 0x02, 0x7f, 0x16, 0x02, 0x02},
+ { 150000000, 0x02, 0x7f, 0x16, 0x03, 0x02},
+ { 200000000, 0x02, 0x7f, 0x17, 0x04, 0x02},
+ { 250000000, 0x02, 0x7f, 0x17, 0x05, 0x04},
+ { 300000000, 0x02, 0x7f, 0x18, 0x06, 0x04},
+ { 400000000, 0x03, 0x7e, 0x19, 0x07, 0x04},
+ { 500000000, 0x03, 0x7c, 0x1b, 0x07, 0x08},
+ { 600000000, 0x03, 0x70, 0x1d, 0x08, 0x10},
+ { 700000000, 0x05, 0x40, 0x1e, 0x08, 0x30},
+ { 800000000, 0x05, 0x02, 0x1f, 0x09, 0x30},
+ {1000000000, 0x05, 0x08, 0x20, 0x09, 0x30},
+ {1200000000, 0x06, 0x03, 0x32, 0x14, 0x0f},
+ {1400000000, 0x09, 0x03, 0x32, 0x14, 0x0f},
+ {1600000000, 0x0d, 0x42, 0x36, 0x0e, 0x0f},
+ {1800000000, 0x0e, 0x47, 0x7a, 0x0e, 0x0f},
+ {2000000000, 0x11, 0x64, 0x7a, 0x0e, 0x0b},
+ {2200000000, 0x13, 0x64, 0x7e, 0x15, 0x0b},
+ {2400000000, 0x13, 0x33, 0x7f, 0x15, 0x6a},
+ {2500000000, 0x15, 0x54, 0x7f, 0x15, 0x6a},
+};
+
+static void phy_update_bits(struct inno_dsidphy *inno,
+ u8 first, u8 second, u8 mask, u8 val)
+{
+ u32 reg = PHY_REG(first, second) << 2;
+ unsigned int tmp, orig;
+
+ orig = readl(inno->phy_base + reg);
+ tmp = orig & ~mask;
+ tmp |= val & mask;
+ writel(tmp, inno->phy_base + reg);
+}
+
+static unsigned long inno_dsidphy_pll_calc_rate(struct inno_dsidphy *inno,
+ unsigned long rate)
+{
+ unsigned long prate = clk_get_rate(inno->ref_clk);
+ unsigned long best_freq = 0;
+ unsigned long fref, fout;
+ u8 min_prediv, max_prediv;
+ u8 _prediv, best_prediv = 1;
+ u16 _fbdiv, best_fbdiv = 1;
+ u32 min_delta = UINT_MAX;
+
+ /*
+ * The PLL output frequency can be calculated using a simple formula:
+ * PLL_Output_Frequency = (FREF / PREDIV * FBDIV) / 2
+ * PLL_Output_Frequency: it is equal to DDR-Clock-Frequency * 2
+ */
+ fref = prate / 2;
+ if (rate > 1000000000UL)
+ fout = 1000000000UL;
+ else
+ fout = rate;
+
+ /* 5Mhz < Fref / prediv < 40MHz */
+ min_prediv = DIV_ROUND_UP(fref, 40000000);
+ max_prediv = fref / 5000000;
+
+ for (_prediv = min_prediv; _prediv <= max_prediv; _prediv++) {
+ u64 tmp;
+ u32 delta;
+
+ tmp = (u64)fout * _prediv;
+ do_div(tmp, fref);
+ _fbdiv = tmp;
+
+ /*
+ * The possible settings of feedback divider are
+ * 12, 13, 14, 16, ~ 511
+ */
+ if (_fbdiv == 15)
+ continue;
+
+ if (_fbdiv < 12 || _fbdiv > 511)
+ continue;
+
+ tmp = (u64)_fbdiv * fref;
+ do_div(tmp, _prediv);
+
+ delta = abs(fout - tmp);
+ if (!delta) {
+ best_prediv = _prediv;
+ best_fbdiv = _fbdiv;
+ best_freq = tmp;
+ break;
+ } else if (delta < min_delta) {
+ best_prediv = _prediv;
+ best_fbdiv = _fbdiv;
+ best_freq = tmp;
+ min_delta = delta;
+ }
+ }
+
+ if (best_freq) {
+ inno->pll.prediv = best_prediv;
+ inno->pll.fbdiv = best_fbdiv;
+ inno->pll.rate = best_freq;
+ }
+
+ return best_freq;
+}
+
+static void inno_dsidphy_mipi_mode_enable(struct inno_dsidphy *inno)
+{
+ struct phy_configure_opts_mipi_dphy *cfg = &inno->dphy_cfg;
+ const struct inno_mipi_dphy_timing *timings;
+ u32 t_txbyteclkhs, t_txclkesc;
+ u32 txbyteclkhs, txclkesc, esc_clk_div;
+ u32 hs_exit, clk_post, clk_pre, wakeup, lpx, ta_go, ta_sure, ta_wait;
+ u32 hs_prepare, hs_trail, hs_zero, clk_lane_hs_zero, data_lane_hs_zero;
+ unsigned int i;
+
+ timings = inno->pdata->inno_mipi_dphy_timing_table;
+
+ inno_dsidphy_pll_calc_rate(inno, cfg->hs_clk_rate);
+
+ /* Select MIPI mode */
+ phy_update_bits(inno, REGISTER_PART_LVDS, 0x03,
+ MODE_ENABLE_MASK, MIPI_MODE_ENABLE);
+ /* Configure PLL */
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x03,
+ REG_PREDIV_MASK, REG_PREDIV(inno->pll.prediv));
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x03,
+ REG_FBDIV_HI_MASK, REG_FBDIV_HI(inno->pll.fbdiv));
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x04,
+ REG_FBDIV_LO_MASK, REG_FBDIV_LO(inno->pll.fbdiv));
+ if (inno->pdata->max_rate == MAX_2_5GHZ) {
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x08,
+ PLL_POST_DIV_ENABLE_MASK, PLL_POST_DIV_ENABLE);
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x0b,
+ CLOCK_LANE_VOD_RANGE_SET_MASK,
+ CLOCK_LANE_VOD_RANGE_SET(VOD_MAX_RANGE));
+ }
+ /* Enable PLL and LDO */
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x01,
+ REG_LDOPD_MASK | REG_PLLPD_MASK,
+ REG_LDOPD_POWER_ON | REG_PLLPD_POWER_ON);
+ /* Reset analog */
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x01,
+ REG_SYNCRST_MASK, REG_SYNCRST_RESET);
+ udelay(1);
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x01,
+ REG_SYNCRST_MASK, REG_SYNCRST_NORMAL);
+ /* Reset digital */
+ phy_update_bits(inno, REGISTER_PART_DIGITAL, 0x00,
+ REG_DIG_RSTN_MASK, REG_DIG_RSTN_RESET);
+ udelay(1);
+ phy_update_bits(inno, REGISTER_PART_DIGITAL, 0x00,
+ REG_DIG_RSTN_MASK, REG_DIG_RSTN_NORMAL);
+
+ txbyteclkhs = inno->pll.rate / 8;
+ t_txbyteclkhs = div_u64(PSEC_PER_SEC, txbyteclkhs);
+
+ esc_clk_div = DIV_ROUND_UP(txbyteclkhs, 20000000);
+ txclkesc = txbyteclkhs / esc_clk_div;
+ t_txclkesc = div_u64(PSEC_PER_SEC, txclkesc);
+
+ /*
+ * The value of counter for HS Ths-exit
+ * Ths-exit = Tpin_txbyteclkhs * value
+ */
+ hs_exit = DIV_ROUND_UP(cfg->hs_exit, t_txbyteclkhs);
+ /*
+ * The value of counter for HS Tclk-post
+ * Tclk-post = Tpin_txbyteclkhs * value
+ */
+ clk_post = DIV_ROUND_UP(cfg->clk_post, t_txbyteclkhs);
+ /*
+ * The value of counter for HS Tclk-pre
+ * Tclk-pre = Tpin_txbyteclkhs * value
+ */
+ clk_pre = DIV_ROUND_UP(cfg->clk_pre, BITS_PER_BYTE);
+
+ /*
+ * The value of counter for HS Tta-go
+ * Tta-go for turnaround
+ * Tta-go = Ttxclkesc * value
+ */
+ ta_go = DIV_ROUND_UP(cfg->ta_go, t_txclkesc);
+ /*
+ * The value of counter for HS Tta-sure
+ * Tta-sure for turnaround
+ * Tta-sure = Ttxclkesc * value
+ */
+ ta_sure = DIV_ROUND_UP(cfg->ta_sure, t_txclkesc);
+ /*
+ * The value of counter for HS Tta-wait
+ * Tta-wait for turnaround
+ * Tta-wait = Ttxclkesc * value
+ */
+ ta_wait = DIV_ROUND_UP(cfg->ta_get, t_txclkesc);
+
+ for (i = 0; i < inno->pdata->num_timings; i++)
+ if (inno->pll.rate <= timings[i].rate)
+ break;
+
+ if (i == inno->pdata->num_timings)
+ --i;
+
+ /*
+ * The value of counter for HS Tlpx Time
+ * Tlpx = Tpin_txbyteclkhs * (2 + value)
+ */
+ if (inno->pdata->max_rate == MAX_1GHZ) {
+ lpx = DIV_ROUND_UP(cfg->lpx, t_txbyteclkhs);
+ if (lpx >= 2)
+ lpx -= 2;
+ } else
+ lpx = timings[i].lpx;
+
+ hs_prepare = timings[i].hs_prepare;
+ hs_trail = timings[i].hs_trail;
+ clk_lane_hs_zero = timings[i].clk_lane_hs_zero;
+ data_lane_hs_zero = timings[i].data_lane_hs_zero;
+ wakeup = 0x3ff;
+
+ for (i = REGISTER_PART_CLOCK_LANE; i <= REGISTER_PART_DATA3_LANE; i++) {
+ if (i == REGISTER_PART_CLOCK_LANE)
+ hs_zero = clk_lane_hs_zero;
+ else
+ hs_zero = data_lane_hs_zero;
+
+ phy_update_bits(inno, i, 0x05, T_LPX_CNT_MASK,
+ T_LPX_CNT(lpx));
+ phy_update_bits(inno, i, 0x06, T_HS_PREPARE_CNT_MASK,
+ T_HS_PREPARE_CNT(hs_prepare));
+ if (inno->pdata->max_rate == MAX_2_5GHZ)
+ phy_update_bits(inno, i, 0x06, T_HS_ZERO_CNT_HI_MASK,
+ T_HS_ZERO_CNT_HI(hs_zero >> 6));
+ phy_update_bits(inno, i, 0x07, T_HS_ZERO_CNT_LO_MASK,
+ T_HS_ZERO_CNT_LO(hs_zero));
+ phy_update_bits(inno, i, 0x08, T_HS_TRAIL_CNT_MASK,
+ T_HS_TRAIL_CNT(hs_trail));
+ if (inno->pdata->max_rate == MAX_2_5GHZ)
+ phy_update_bits(inno, i, 0x11, T_HS_EXIT_CNT_HI_MASK,
+ T_HS_EXIT_CNT_HI(hs_exit >> 5));
+ phy_update_bits(inno, i, 0x09, T_HS_EXIT_CNT_LO_MASK,
+ T_HS_EXIT_CNT_LO(hs_exit));
+ if (inno->pdata->max_rate == MAX_2_5GHZ)
+ phy_update_bits(inno, i, 0x10, T_CLK_POST_CNT_HI_MASK,
+ T_CLK_POST_CNT_HI(clk_post >> 4));
+ phy_update_bits(inno, i, 0x0a, T_CLK_POST_CNT_LO_MASK,
+ T_CLK_POST_CNT_LO(clk_post));
+ phy_update_bits(inno, i, 0x0e, T_CLK_PRE_CNT_MASK,
+ T_CLK_PRE_CNT(clk_pre));
+ phy_update_bits(inno, i, 0x0c, T_WAKEUP_CNT_HI_MASK,
+ T_WAKEUP_CNT_HI(wakeup >> 8));
+ phy_update_bits(inno, i, 0x0d, T_WAKEUP_CNT_LO_MASK,
+ T_WAKEUP_CNT_LO(wakeup));
+ phy_update_bits(inno, i, 0x10, T_TA_GO_CNT_MASK,
+ T_TA_GO_CNT(ta_go));
+ phy_update_bits(inno, i, 0x11, T_TA_SURE_CNT_MASK,
+ T_TA_SURE_CNT(ta_sure));
+ phy_update_bits(inno, i, 0x12, T_TA_WAIT_CNT_MASK,
+ T_TA_WAIT_CNT(ta_wait));
+ }
+
+ /* Enable all lanes on analog part */
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
+ LANE_EN_MASK, LANE_EN_CK | LANE_EN_3 | LANE_EN_2 |
+ LANE_EN_1 | LANE_EN_0);
+}
+
+static void inno_dsidphy_lvds_mode_enable(struct inno_dsidphy *inno)
+{
+ u8 prediv = 2;
+ u16 fbdiv = 28;
+
+ /* Sample clock reverse direction */
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x08,
+ SAMPLE_CLOCK_DIRECTION_MASK | LOWFRE_EN_MASK,
+ SAMPLE_CLOCK_DIRECTION_REVERSE |
+ PLL_OUTPUT_FREQUENCY_DIV_BY_1);
+
+ /* Select LVDS mode */
+ phy_update_bits(inno, REGISTER_PART_LVDS, 0x03,
+ MODE_ENABLE_MASK, LVDS_MODE_ENABLE);
+ /* Configure PLL */
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x03,
+ REG_PREDIV_MASK, REG_PREDIV(prediv));
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x03,
+ REG_FBDIV_HI_MASK, REG_FBDIV_HI(fbdiv));
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x04,
+ REG_FBDIV_LO_MASK, REG_FBDIV_LO(fbdiv));
+ phy_update_bits(inno, REGISTER_PART_LVDS, 0x08, 0xff, 0xfc);
+ /* Enable PLL and Bandgap */
+ phy_update_bits(inno, REGISTER_PART_LVDS, 0x0b,
+ LVDS_PLL_POWER_MASK | LVDS_BANDGAP_POWER_MASK,
+ LVDS_PLL_POWER_ON | LVDS_BANDGAP_POWER_ON);
+
+ msleep(20);
+
+ /* Select PLL mode */
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x1e,
+ PLL_MODE_SEL_MASK, PLL_MODE_SEL_LVDS_MODE);
+
+ /* Reset LVDS digital logic */
+ phy_update_bits(inno, REGISTER_PART_LVDS, 0x00,
+ LVDS_DIGITAL_INTERNAL_RESET_MASK,
+ LVDS_DIGITAL_INTERNAL_RESET_ENABLE);
+ udelay(1);
+ phy_update_bits(inno, REGISTER_PART_LVDS, 0x00,
+ LVDS_DIGITAL_INTERNAL_RESET_MASK,
+ LVDS_DIGITAL_INTERNAL_RESET_DISABLE);
+ /* Enable LVDS digital logic */
+ phy_update_bits(inno, REGISTER_PART_LVDS, 0x01,
+ LVDS_DIGITAL_INTERNAL_ENABLE_MASK,
+ LVDS_DIGITAL_INTERNAL_ENABLE);
+ /* Enable LVDS analog driver */
+ phy_update_bits(inno, REGISTER_PART_LVDS, 0x0b,
+ LVDS_LANE_EN_MASK, LVDS_CLK_LANE_EN |
+ LVDS_DATA_LANE0_EN | LVDS_DATA_LANE1_EN |
+ LVDS_DATA_LANE2_EN | LVDS_DATA_LANE3_EN);
+}
+
+static int inno_dsidphy_power_on(struct phy *phy)
+{
+ struct inno_dsidphy *inno = phy_get_drvdata(phy);
+
+ clk_prepare_enable(inno->pclk_phy);
+ clk_prepare_enable(inno->ref_clk);
+ pm_runtime_get_sync(inno->dev);
+
+ /* Bandgap power on */
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
+ BANDGAP_POWER_MASK, BANDGAP_POWER_ON);
+ /* Enable power work */
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
+ POWER_WORK_MASK, POWER_WORK_ENABLE);
+
+ switch (inno->mode) {
+ case PHY_MODE_MIPI_DPHY:
+ inno_dsidphy_mipi_mode_enable(inno);
+ break;
+ case PHY_MODE_LVDS:
+ inno_dsidphy_lvds_mode_enable(inno);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int inno_dsidphy_power_off(struct phy *phy)
+{
+ struct inno_dsidphy *inno = phy_get_drvdata(phy);
+
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00, LANE_EN_MASK, 0);
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x01,
+ REG_LDOPD_MASK | REG_PLLPD_MASK,
+ REG_LDOPD_POWER_DOWN | REG_PLLPD_POWER_DOWN);
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
+ POWER_WORK_MASK, POWER_WORK_DISABLE);
+ phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
+ BANDGAP_POWER_MASK, BANDGAP_POWER_DOWN);
+
+ phy_update_bits(inno, REGISTER_PART_LVDS, 0x0b, LVDS_LANE_EN_MASK, 0);
+ phy_update_bits(inno, REGISTER_PART_LVDS, 0x01,
+ LVDS_DIGITAL_INTERNAL_ENABLE_MASK,
+ LVDS_DIGITAL_INTERNAL_DISABLE);
+ phy_update_bits(inno, REGISTER_PART_LVDS, 0x0b,
+ LVDS_PLL_POWER_MASK | LVDS_BANDGAP_POWER_MASK,
+ LVDS_PLL_POWER_OFF | LVDS_BANDGAP_POWER_DOWN);
+
+ pm_runtime_put(inno->dev);
+ clk_disable_unprepare(inno->ref_clk);
+ clk_disable_unprepare(inno->pclk_phy);
+
+ return 0;
+}
+
+static int inno_dsidphy_set_mode(struct phy *phy, enum phy_mode mode,
+ int submode)
+{
+ struct inno_dsidphy *inno = phy_get_drvdata(phy);
+
+ switch (mode) {
+ case PHY_MODE_MIPI_DPHY:
+ case PHY_MODE_LVDS:
+ inno->mode = mode;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int inno_dsidphy_configure(struct phy *phy,
+ union phy_configure_opts *opts)
+{
+ struct inno_dsidphy *inno = phy_get_drvdata(phy);
+ int ret;
+
+ if (inno->mode != PHY_MODE_MIPI_DPHY)
+ return -EINVAL;
+
+ ret = phy_mipi_dphy_config_validate(&opts->mipi_dphy);
+ if (ret)
+ return ret;
+
+ memcpy(&inno->dphy_cfg, &opts->mipi_dphy, sizeof(inno->dphy_cfg));
+
+ return 0;
+}
+
+static const struct phy_ops inno_dsidphy_ops = {
+ .configure = inno_dsidphy_configure,
+ .set_mode = inno_dsidphy_set_mode,
+ .power_on = inno_dsidphy_power_on,
+ .power_off = inno_dsidphy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static const struct inno_video_phy_plat_data max_1ghz_video_phy_plat_data = {
+ .inno_mipi_dphy_timing_table = inno_mipi_dphy_timing_table_max_1ghz,
+ .num_timings = ARRAY_SIZE(inno_mipi_dphy_timing_table_max_1ghz),
+ .max_rate = MAX_1GHZ,
+};
+
+static const struct inno_video_phy_plat_data max_2_5ghz_video_phy_plat_data = {
+ .inno_mipi_dphy_timing_table = inno_mipi_dphy_timing_table_max_2_5ghz,
+ .num_timings = ARRAY_SIZE(inno_mipi_dphy_timing_table_max_2_5ghz),
+ .max_rate = MAX_2_5GHZ,
+};
+
+static int inno_dsidphy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct inno_dsidphy *inno;
+ struct phy_provider *phy_provider;
+ struct phy *phy;
+ int ret;
+
+ inno = devm_kzalloc(dev, sizeof(*inno), GFP_KERNEL);
+ if (!inno)
+ return -ENOMEM;
+
+ inno->dev = dev;
+ inno->pdata = of_device_get_match_data(inno->dev);
+ platform_set_drvdata(pdev, inno);
+
+ inno->phy_base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(inno->phy_base))
+ return PTR_ERR(inno->phy_base);
+
+ inno->ref_clk = devm_clk_get(dev, "ref");
+ if (IS_ERR(inno->ref_clk)) {
+ ret = PTR_ERR(inno->ref_clk);
+ dev_err(dev, "failed to get ref clock: %d\n", ret);
+ return ret;
+ }
+
+ inno->pclk_phy = devm_clk_get(dev, "pclk");
+ if (IS_ERR(inno->pclk_phy)) {
+ ret = PTR_ERR(inno->pclk_phy);
+ dev_err(dev, "failed to get phy pclk: %d\n", ret);
+ return ret;
+ }
+
+ inno->rst = devm_reset_control_get(dev, "apb");
+ if (IS_ERR(inno->rst)) {
+ ret = PTR_ERR(inno->rst);
+ dev_err(dev, "failed to get system reset control: %d\n", ret);
+ return ret;
+ }
+
+ phy = devm_phy_create(dev, NULL, &inno_dsidphy_ops);
+ if (IS_ERR(phy)) {
+ ret = PTR_ERR(phy);
+ dev_err(dev, "failed to create phy: %d\n", ret);
+ return ret;
+ }
+
+ phy_set_drvdata(phy, inno);
+
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+ if (IS_ERR(phy_provider)) {
+ ret = PTR_ERR(phy_provider);
+ dev_err(dev, "failed to register phy provider: %d\n", ret);
+ return ret;
+ }
+
+ pm_runtime_enable(dev);
+
+ return 0;
+}
+
+static void inno_dsidphy_remove(struct platform_device *pdev)
+{
+ struct inno_dsidphy *inno = platform_get_drvdata(pdev);
+
+ pm_runtime_disable(inno->dev);
+}
+
+static const struct of_device_id inno_dsidphy_of_match[] = {
+ {
+ .compatible = "rockchip,px30-dsi-dphy",
+ .data = &max_1ghz_video_phy_plat_data,
+ }, {
+ .compatible = "rockchip,rk3128-dsi-dphy",
+ .data = &max_1ghz_video_phy_plat_data,
+ }, {
+ .compatible = "rockchip,rk3368-dsi-dphy",
+ .data = &max_1ghz_video_phy_plat_data,
+ }, {
+ .compatible = "rockchip,rk3568-dsi-dphy",
+ .data = &max_2_5ghz_video_phy_plat_data,
+ }, {
+ .compatible = "rockchip,rv1126-dsi-dphy",
+ .data = &max_2_5ghz_video_phy_plat_data,
+ },
+ {}
+};
+MODULE_DEVICE_TABLE(of, inno_dsidphy_of_match);
+
+static struct platform_driver inno_dsidphy_driver = {
+ .driver = {
+ .name = "inno-dsidphy",
+ .of_match_table = of_match_ptr(inno_dsidphy_of_match),
+ },
+ .probe = inno_dsidphy_probe,
+ .remove_new = inno_dsidphy_remove,
+};
+module_platform_driver(inno_dsidphy_driver);
+
+MODULE_AUTHOR("Wyon Bi <bivvy.bi@rock-chips.com>");
+MODULE_DESCRIPTION("Innosilicon MIPI/LVDS/TTL Video Combo PHY driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 07:13:49 +0000