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Mon, 27 May 2024 09:32:49 -0400 (EDT) From: =?utf-8?q?Niklas_S=C3=B6derlund?= To: Mauro Carvalho Chehab , Geert Uytterhoeven , linux-media@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, =?utf-8?q?Niklas_S=C3=B6derlund?= Subject: [PATCH 7/7] media: rcar-csi2: Add support for R-Car V4M Date: Mon, 27 May 2024 15:32:21 +0200 Message-ID: <20240527133221.1688830-8-niklas.soderlund+renesas@ragnatech.se> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240527133221.1688830-1-niklas.soderlund+renesas@ragnatech.se> References: <20240527133221.1688830-1-niklas.soderlund+renesas@ragnatech.se> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The V4M is the second Gen4 device that is enabled in the rcar-csi2 driver. There is much overlap with the already supported V4H device. The registers that where new on Gen4 and where added with the V4H prefix are retained and only new registers unique to the V4M are added with the new V4M prefix. This follows the style for when V4H was added which had an overlap with Gen3 registers. The V4M CSI-2 receiver supports D-PHY mode only, either in 1-, 2- or 4-lane configuration. The datasheets do not document lane swapping and is left out for now. While the V4M only supports D-PHY the configuration for it is added in such a way that it can be reused for V4H which supports both C-PHY and D-PHY. No known SoC exists to test the D-PHY configuration on V4H so it's not wired-up. Signed-off-by: Niklas Söderlund --- drivers/media/platform/renesas/rcar-csi2.c | 291 +++++++++++++++++++++ 1 file changed, 291 insertions(+) diff --git a/drivers/media/platform/renesas/rcar-csi2.c b/drivers/media/platform/renesas/rcar-csi2.c index 46c4f20cce88..83e0c5b25030 100644 --- a/drivers/media/platform/renesas/rcar-csi2.c +++ b/drivers/media/platform/renesas/rcar-csi2.c @@ -247,6 +247,25 @@ static const struct rcsi2_cphy_setting cphy_setting_table_r8a779g0[] = { { /* sentinel */ }, }; +/* V4M registers */ +#define V4M_OVR1_REG 0x0848 +#define V4M_OVR1_FORCERXMODE_3 BIT(12) +#define V4M_OVR1_FORCERXMODE_2 BIT(11) +#define V4M_OVR1_FORCERXMODE_1 BIT(10) +#define V4M_OVR1_FORCERXMODE_0 BIT(9) + +#define V4M_FRXM_REG 0x2004 +#define V4M_FRXM_FORCERXMODE_3 BIT(3) +#define V4M_FRXM_FORCERXMODE_2 BIT(2) +#define V4M_FRXM_FORCERXMODE_1 BIT(1) +#define V4M_FRXM_FORCERXMODE_0 BIT(0) + +#define V4M_PHYPLL_REG 0x02050 +#define V4M_CSI0CLKFCPR_REG 0x02054 +#define V4M_PHTW_REG 0x02060 +#define V4M_PHTR_REG 0x02064 +#define V4M_PHTC_REG 0x02068 + struct phtw_value { u8 data; u8 code; @@ -255,6 +274,7 @@ struct phtw_value { struct rcsi2_mbps_info { u16 mbps; u8 reg; + u16 osc_freq; /* V4M */ }; static const struct rcsi2_mbps_info phtw_mbps_v3u[] = { @@ -506,6 +526,73 @@ static const struct rcsi2_mbps_info hsfreqrange_m3w[] = { { /* sentinel */ }, }; +static const struct rcsi2_mbps_info hsfreqrange_v4m[] = { + { .mbps = 80, .reg = 0x00, .osc_freq = 0x01a9 }, + { .mbps = 90, .reg = 0x10, .osc_freq = 0x01a9 }, + { .mbps = 100, .reg = 0x20, .osc_freq = 0x01a9 }, + { .mbps = 110, .reg = 0x30, .osc_freq = 0x01a9 }, + { .mbps = 120, .reg = 0x01, .osc_freq = 0x01a9 }, + { .mbps = 130, .reg = 0x11, .osc_freq = 0x01a9 }, + { .mbps = 140, .reg = 0x21, .osc_freq = 0x01a9 }, + { .mbps = 150, .reg = 0x31, .osc_freq = 0x01a9 }, + { .mbps = 160, .reg = 0x02, .osc_freq = 0x01a9 }, + { .mbps = 170, .reg = 0x12, .osc_freq = 0x01a9 }, + { .mbps = 180, .reg = 0x22, .osc_freq = 0x01a9 }, + { .mbps = 190, .reg = 0x32, .osc_freq = 0x01a9 }, + { .mbps = 205, .reg = 0x03, .osc_freq = 0x01a9 }, + { .mbps = 220, .reg = 0x13, .osc_freq = 0x01a9 }, + { .mbps = 235, .reg = 0x23, .osc_freq = 0x01a9 }, + { .mbps = 250, .reg = 0x33, .osc_freq = 0x01a9 }, + { .mbps = 275, .reg = 0x04, .osc_freq = 0x01a9 }, + { .mbps = 300, .reg = 0x14, .osc_freq = 0x01a9 }, + { .mbps = 325, .reg = 0x25, .osc_freq = 0x01a9 }, + { .mbps = 350, .reg = 0x35, .osc_freq = 0x01a9 }, + { .mbps = 400, .reg = 0x05, .osc_freq = 0x01a9 }, + { .mbps = 450, .reg = 0x16, .osc_freq = 0x01a9 }, + { .mbps = 500, .reg = 0x26, .osc_freq = 0x01a9 }, + { .mbps = 550, .reg = 0x37, .osc_freq = 0x01a9 }, + { .mbps = 600, .reg = 0x07, .osc_freq = 0x01a9 }, + { .mbps = 650, .reg = 0x18, .osc_freq = 0x01a9 }, + { .mbps = 700, .reg = 0x28, .osc_freq = 0x01a9 }, + { .mbps = 750, .reg = 0x39, .osc_freq = 0x01a9 }, + { .mbps = 800, .reg = 0x09, .osc_freq = 0x01a9 }, + { .mbps = 850, .reg = 0x19, .osc_freq = 0x01a9 }, + { .mbps = 900, .reg = 0x29, .osc_freq = 0x01a9 }, + { .mbps = 950, .reg = 0x3a, .osc_freq = 0x01a9 }, + { .mbps = 1000, .reg = 0x0a, .osc_freq = 0x01a9 }, + { .mbps = 1050, .reg = 0x1a, .osc_freq = 0x01a9 }, + { .mbps = 1100, .reg = 0x2a, .osc_freq = 0x01a9 }, + { .mbps = 1150, .reg = 0x3b, .osc_freq = 0x01a9 }, + { .mbps = 1200, .reg = 0x0b, .osc_freq = 0x01a9 }, + { .mbps = 1250, .reg = 0x1b, .osc_freq = 0x01a9 }, + { .mbps = 1300, .reg = 0x2b, .osc_freq = 0x01a9 }, + { .mbps = 1350, .reg = 0x3c, .osc_freq = 0x01a9 }, + { .mbps = 1400, .reg = 0x0c, .osc_freq = 0x01a9 }, + { .mbps = 1450, .reg = 0x1c, .osc_freq = 0x01a9 }, + { .mbps = 1500, .reg = 0x2c, .osc_freq = 0x01a9 }, + { .mbps = 1550, .reg = 0x3d, .osc_freq = 0x0108 }, + { .mbps = 1600, .reg = 0x0d, .osc_freq = 0x0110 }, + { .mbps = 1650, .reg = 0x1d, .osc_freq = 0x0119 }, + { .mbps = 1700, .reg = 0x2e, .osc_freq = 0x0121 }, + { .mbps = 1750, .reg = 0x3e, .osc_freq = 0x012a }, + { .mbps = 1800, .reg = 0x0e, .osc_freq = 0x0132 }, + { .mbps = 1850, .reg = 0x1e, .osc_freq = 0x013b }, + { .mbps = 1900, .reg = 0x2f, .osc_freq = 0x0143 }, + { .mbps = 1950, .reg = 0x3f, .osc_freq = 0x014c }, + { .mbps = 2000, .reg = 0x0f, .osc_freq = 0x0154 }, + { .mbps = 2050, .reg = 0x40, .osc_freq = 0x015d }, + { .mbps = 2100, .reg = 0x41, .osc_freq = 0x0165 }, + { .mbps = 2150, .reg = 0x42, .osc_freq = 0x016e }, + { .mbps = 2200, .reg = 0x43, .osc_freq = 0x0176 }, + { .mbps = 2250, .reg = 0x44, .osc_freq = 0x017f }, + { .mbps = 2300, .reg = 0x45, .osc_freq = 0x0187 }, + { .mbps = 2350, .reg = 0x46, .osc_freq = 0x0190 }, + { .mbps = 2400, .reg = 0x47, .osc_freq = 0x0198 }, + { .mbps = 2450, .reg = 0x48, .osc_freq = 0x01a1 }, + { .mbps = 2500, .reg = 0x49, .osc_freq = 0x01a9 }, + { /* sentinel */ }, +}; + /* PHY ESC Error Monitor */ #define PHEERM_REG 0x74 @@ -1178,6 +1265,192 @@ static int rcsi2_start_receiver_v4h(struct rcar_csi2 *priv) return 0; } +static int rcsi2_d_phy_setting_v4m(struct rcar_csi2 *priv, int data_rate) +{ + unsigned int timeout; + int ret; + + static const struct phtw_value step1[] = { + { .data = 0x00, .code = 0x00 }, + { .data = 0x00, .code = 0x1e }, + }; + + /* Shutdown and reset PHY. */ + rcsi2_write(priv, V4H_DPHY_RSTZ_REG, BIT(0)); + rcsi2_write(priv, V4H_PHY_SHUTDOWNZ_REG, BIT(0)); + + /* Start internal calibration (POR). */ + ret = rcsi2_phtw_write_array(priv, step1, ARRAY_SIZE(step1)); + if (ret) + return ret; + + /* Wait for POR to complete. */ + for (timeout = 10; timeout > 0; timeout--) { + if ((rcsi2_read(priv, V4M_PHTR_REG) & 0xf0000) == 0x70000) + break; + usleep_range(1000, 2000); + } + + if (!timeout) { + dev_err(priv->dev, "D-PHY calibration failed\n"); + return -ETIMEDOUT; + } + + return 0; +} + +static int rcsi2_set_osc_freq(struct rcar_csi2 *priv, unsigned int mbps) +{ + const struct rcsi2_mbps_info *info; + struct phtw_value steps[] = { + { .data = 0x00, .code = 0x00 }, + { .code = 0xe2 }, /* Data filled in below. */ + { .code = 0xe3 }, /* Data filled in below. */ + { .data = 0x01, .code = 0xe4 }, + }; + + info = rcsi2_mbps_to_info(priv, priv->info->hsfreqrange, mbps); + if (!info) + return -ERANGE; + + /* Fill in data for command. */ + steps[1].data = (info->osc_freq & 0x00ff) >> 0; + steps[2].data = (info->osc_freq & 0x0f00) >> 8; + + return rcsi2_phtw_write_array(priv, steps, ARRAY_SIZE(steps)); +} + +static int rcsi2_init_common_v4m(struct rcar_csi2 *priv, unsigned int mbps) +{ + int ret; + + static const struct phtw_value step1[] = { + { .data = 0x00, .code = 0x00 }, + { .data = 0x3c, .code = 0x08 }, + }; + + static const struct phtw_value step2[] = { + { .data = 0x00, .code = 0x00 }, + { .data = 0x80, .code = 0xe0 }, + { .data = 0x01, .code = 0xe1 }, + { .data = 0x06, .code = 0x00 }, + { .data = 0x0f, .code = 0x11 }, + { .data = 0x08, .code = 0x00 }, + { .data = 0x0f, .code = 0x11 }, + { .data = 0x0a, .code = 0x00 }, + { .data = 0x0f, .code = 0x11 }, + { .data = 0x0c, .code = 0x00 }, + { .data = 0x0f, .code = 0x11 }, + { .data = 0x01, .code = 0x00 }, + { .data = 0x31, .code = 0xaa }, + { .data = 0x05, .code = 0x00 }, + { .data = 0x05, .code = 0x09 }, + { .data = 0x07, .code = 0x00 }, + { .data = 0x05, .code = 0x09 }, + { .data = 0x09, .code = 0x00 }, + { .data = 0x05, .code = 0x09 }, + { .data = 0x0b, .code = 0x00 }, + { .data = 0x05, .code = 0x09 }, + }; + + if (priv->info->hsfreqrange) { + ret = rcsi2_set_phypll(priv, mbps); + if (ret) + return ret; + + ret = rcsi2_set_osc_freq(priv, mbps); + if (ret) + return ret; + } + + if (mbps <= 1500) { + ret = rcsi2_phtw_write_array(priv, step1, ARRAY_SIZE(step1)); + if (ret) + return ret; + } + + if (priv->info->csi0clkfreqrange) + rcsi2_write(priv, V4M_CSI0CLKFCPR_REG, + CSI0CLKFREQRANGE(priv->info->csi0clkfreqrange)); + + rcsi2_write(priv, V4H_PHY_EN_REG, V4H_PHY_EN_ENABLE_CLK | + V4H_PHY_EN_ENABLE_0 | V4H_PHY_EN_ENABLE_1 | + V4H_PHY_EN_ENABLE_2 | V4H_PHY_EN_ENABLE_3); + + if (mbps > 1500) { + ret = rcsi2_phtw_write_array(priv, step2, ARRAY_SIZE(step2)); + if (ret) + return ret; + } + + return ret; +} + +static int rcsi2_start_receiver_v4m(struct rcar_csi2 *priv) +{ + const struct rcar_csi2_format *format; + unsigned int lanes; + int mbps; + int ret; + + /* Calculate parameters */ + format = rcsi2_code_to_fmt(priv->mf.code); + if (!format) + return -EINVAL; + + ret = rcsi2_get_active_lanes(priv, &lanes); + if (ret) + return ret; + + mbps = rcsi2_calc_mbps(priv, format->bpp, lanes); + if (mbps < 0) + return mbps; + + /* Reset LINK and PHY */ + rcsi2_write(priv, V4H_CSI2_RESETN_REG, 0); + rcsi2_write(priv, V4H_DPHY_RSTZ_REG, 0); + rcsi2_write(priv, V4H_PHY_SHUTDOWNZ_REG, 0); + rcsi2_write(priv, V4M_PHTC_REG, PHTC_TESTCLR); + + /* PHY static setting */ + rcsi2_write(priv, V4H_PHY_EN_REG, V4H_PHY_EN_ENABLE_CLK); + rcsi2_write(priv, V4H_FLDC_REG, 0); + rcsi2_write(priv, V4H_FLDD_REG, 0); + rcsi2_write(priv, V4H_IDIC_REG, 0); + rcsi2_write(priv, V4H_PHY_MODE_REG, V4H_PHY_MODE_DPHY); + rcsi2_write(priv, V4H_N_LANES_REG, lanes - 1); + + rcsi2_write(priv, V4M_FRXM_REG, + V4M_FRXM_FORCERXMODE_0 | V4M_FRXM_FORCERXMODE_1 | + V4M_FRXM_FORCERXMODE_2 | V4M_FRXM_FORCERXMODE_3); + rcsi2_write(priv, V4M_OVR1_REG, + V4M_OVR1_FORCERXMODE_0 | V4M_OVR1_FORCERXMODE_1 | + V4M_OVR1_FORCERXMODE_2 | V4M_OVR1_FORCERXMODE_3); + + /* Reset CSI2 */ + rcsi2_write(priv, V4M_PHTC_REG, 0); + rcsi2_write(priv, V4H_CSI2_RESETN_REG, BIT(0)); + + /* Common settings */ + ret = rcsi2_init_common_v4m(priv, mbps); + if (ret) + return ret; + + /* D-PHY settings */ + ret = rcsi2_d_phy_setting_v4m(priv, mbps); + if (ret) + return ret; + + rcsi2_wait_phy_start_v4h(priv, V4H_ST_PHYST_ST_STOPSTATE_0 | + V4H_ST_PHYST_ST_STOPSTATE_1 | + V4H_ST_PHYST_ST_STOPSTATE_2 | + V4H_ST_PHYST_ST_STOPSTATE_3); + + rcsi2_write(priv, V4M_FRXM_REG, 0); + + return 0; +} + static int rcsi2_start(struct rcar_csi2 *priv) { int ret; @@ -1806,6 +2079,20 @@ static const struct rcar_csi2_info rcar_csi2_info_r8a779g0 = { .support_cphy = true, }; +static const struct rcsi2_register_layout rcsi2_registers_v4m = { + .phtw = V4M_PHTW_REG, + .phypll = V4M_PHYPLL_REG, +}; + +static const struct rcar_csi2_info rcar_csi2_info_r8a779h0 = { + .regs = &rcsi2_registers_v4m, + .start_receiver = rcsi2_start_receiver_v4m, + .hsfreqrange = hsfreqrange_v4m, + .csi0clkfreqrange = 0x0c, + .use_isp = true, + .support_dphy = true, +}; + static const struct of_device_id rcar_csi2_of_table[] = { { .compatible = "renesas,r8a774a1-csi2", @@ -1859,6 +2146,10 @@ static const struct of_device_id rcar_csi2_of_table[] = { .compatible = "renesas,r8a779g0-csi2", .data = &rcar_csi2_info_r8a779g0, }, + { + .compatible = "renesas,r8a779h0-csi2", + .data = &rcar_csi2_info_r8a779h0, + }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, rcar_csi2_of_table);