Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 1 | /* |
| 2 | * LCD panel driver for LG.Philips LB035Q02 |
| 3 | * |
| 4 | * Author: Steve Sakoman <steve@sakoman.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published by |
| 8 | * the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 13 | * more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along with |
| 16 | * this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/delay.h> |
| 21 | #include <linux/spi/spi.h> |
| 22 | #include <linux/mutex.h> |
Archit Taneja | 7232b1f | 2012-11-30 15:11:09 +0530 | [diff] [blame] | 23 | #include <linux/gpio.h> |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 24 | |
Tomi Valkeinen | a0b38cc | 2011-05-11 14:05:07 +0300 | [diff] [blame] | 25 | #include <video/omapdss.h> |
Archit Taneja | 7232b1f | 2012-11-30 15:11:09 +0530 | [diff] [blame] | 26 | #include <video/omap-panel-data.h> |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 27 | |
| 28 | struct lb035q02_data { |
| 29 | struct mutex lock; |
| 30 | }; |
| 31 | |
| 32 | static struct omap_video_timings lb035q02_timings = { |
| 33 | .x_res = 320, |
| 34 | .y_res = 240, |
| 35 | |
| 36 | .pixel_clock = 6500, |
| 37 | |
| 38 | .hsw = 2, |
| 39 | .hfp = 20, |
| 40 | .hbp = 68, |
| 41 | |
| 42 | .vsw = 2, |
| 43 | .vfp = 4, |
| 44 | .vbp = 18, |
Archit Taneja | a8d5e41 | 2012-06-25 12:26:38 +0530 | [diff] [blame] | 45 | |
| 46 | .vsync_level = OMAPDSS_SIG_ACTIVE_LOW, |
| 47 | .hsync_level = OMAPDSS_SIG_ACTIVE_LOW, |
| 48 | .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE, |
| 49 | .de_level = OMAPDSS_SIG_ACTIVE_HIGH, |
| 50 | .sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES, |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 51 | }; |
| 52 | |
Archit Taneja | 7232b1f | 2012-11-30 15:11:09 +0530 | [diff] [blame] | 53 | static inline struct panel_generic_dpi_data |
| 54 | *get_panel_data(const struct omap_dss_device *dssdev) |
| 55 | { |
| 56 | return (struct panel_generic_dpi_data *) dssdev->data; |
| 57 | } |
| 58 | |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 59 | static int lb035q02_panel_power_on(struct omap_dss_device *dssdev) |
| 60 | { |
Archit Taneja | 7232b1f | 2012-11-30 15:11:09 +0530 | [diff] [blame] | 61 | struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev); |
| 62 | int r, i; |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 63 | |
| 64 | if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) |
| 65 | return 0; |
| 66 | |
Archit Taneja | c499144 | 2012-08-08 14:28:54 +0530 | [diff] [blame] | 67 | omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings); |
Archit Taneja | c6b393d | 2012-07-06 15:30:52 +0530 | [diff] [blame] | 68 | omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines); |
Archit Taneja | c499144 | 2012-08-08 14:28:54 +0530 | [diff] [blame] | 69 | |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 70 | r = omapdss_dpi_display_enable(dssdev); |
| 71 | if (r) |
| 72 | goto err0; |
| 73 | |
Archit Taneja | 7232b1f | 2012-11-30 15:11:09 +0530 | [diff] [blame] | 74 | for (i = 0; i < panel_data->num_gpios; ++i) { |
| 75 | gpio_set_value_cansleep(panel_data->gpios[i], |
| 76 | panel_data->gpio_invert[i] ? 0 : 1); |
| 77 | } |
| 78 | |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 79 | return 0; |
Archit Taneja | 32fb490 | 2012-09-17 11:51:09 +0300 | [diff] [blame] | 80 | |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 81 | err0: |
| 82 | return r; |
| 83 | } |
| 84 | |
| 85 | static void lb035q02_panel_power_off(struct omap_dss_device *dssdev) |
| 86 | { |
Archit Taneja | 7232b1f | 2012-11-30 15:11:09 +0530 | [diff] [blame] | 87 | struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev); |
| 88 | int i; |
| 89 | |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 90 | if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) |
| 91 | return; |
| 92 | |
Archit Taneja | 7232b1f | 2012-11-30 15:11:09 +0530 | [diff] [blame] | 93 | for (i = panel_data->num_gpios - 1; i >= 0; --i) { |
| 94 | gpio_set_value_cansleep(panel_data->gpios[i], |
| 95 | panel_data->gpio_invert[i] ? 1 : 0); |
| 96 | } |
| 97 | |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 98 | omapdss_dpi_display_disable(dssdev); |
| 99 | } |
| 100 | |
| 101 | static int lb035q02_panel_probe(struct omap_dss_device *dssdev) |
| 102 | { |
Archit Taneja | 7232b1f | 2012-11-30 15:11:09 +0530 | [diff] [blame] | 103 | struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev); |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 104 | struct lb035q02_data *ld; |
Archit Taneja | 7232b1f | 2012-11-30 15:11:09 +0530 | [diff] [blame] | 105 | int r, i; |
| 106 | |
| 107 | if (!panel_data) |
| 108 | return -EINVAL; |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 109 | |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 110 | dssdev->panel.timings = lb035q02_timings; |
| 111 | |
Tomi Valkeinen | ecc8b37 | 2013-02-14 14:17:28 +0200 | [diff] [blame^] | 112 | ld = devm_kzalloc(dssdev->dev, sizeof(*ld), GFP_KERNEL); |
Archit Taneja | e4dace4 | 2012-11-30 15:09:07 +0530 | [diff] [blame] | 113 | if (!ld) |
| 114 | return -ENOMEM; |
| 115 | |
Archit Taneja | 7232b1f | 2012-11-30 15:11:09 +0530 | [diff] [blame] | 116 | for (i = 0; i < panel_data->num_gpios; ++i) { |
Tomi Valkeinen | ecc8b37 | 2013-02-14 14:17:28 +0200 | [diff] [blame^] | 117 | r = devm_gpio_request_one(dssdev->dev, panel_data->gpios[i], |
Archit Taneja | 7232b1f | 2012-11-30 15:11:09 +0530 | [diff] [blame] | 118 | panel_data->gpio_invert[i] ? |
| 119 | GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW, |
| 120 | "panel gpio"); |
| 121 | if (r) |
| 122 | return r; |
| 123 | } |
| 124 | |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 125 | mutex_init(&ld->lock); |
Tomi Valkeinen | ecc8b37 | 2013-02-14 14:17:28 +0200 | [diff] [blame^] | 126 | dev_set_drvdata(dssdev->dev, ld); |
Archit Taneja | e4dace4 | 2012-11-30 15:09:07 +0530 | [diff] [blame] | 127 | |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 128 | return 0; |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | static void lb035q02_panel_remove(struct omap_dss_device *dssdev) |
| 132 | { |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | static int lb035q02_panel_enable(struct omap_dss_device *dssdev) |
| 136 | { |
Tomi Valkeinen | ecc8b37 | 2013-02-14 14:17:28 +0200 | [diff] [blame^] | 137 | struct lb035q02_data *ld = dev_get_drvdata(dssdev->dev); |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 138 | int r; |
| 139 | |
| 140 | mutex_lock(&ld->lock); |
| 141 | |
| 142 | r = lb035q02_panel_power_on(dssdev); |
| 143 | if (r) |
| 144 | goto err; |
| 145 | dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; |
| 146 | |
| 147 | mutex_unlock(&ld->lock); |
| 148 | return 0; |
| 149 | err: |
| 150 | mutex_unlock(&ld->lock); |
| 151 | return r; |
| 152 | } |
| 153 | |
| 154 | static void lb035q02_panel_disable(struct omap_dss_device *dssdev) |
| 155 | { |
Tomi Valkeinen | ecc8b37 | 2013-02-14 14:17:28 +0200 | [diff] [blame^] | 156 | struct lb035q02_data *ld = dev_get_drvdata(dssdev->dev); |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 157 | |
| 158 | mutex_lock(&ld->lock); |
| 159 | |
| 160 | lb035q02_panel_power_off(dssdev); |
| 161 | dssdev->state = OMAP_DSS_DISPLAY_DISABLED; |
| 162 | |
| 163 | mutex_unlock(&ld->lock); |
| 164 | } |
| 165 | |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 166 | static struct omap_dss_driver lb035q02_driver = { |
| 167 | .probe = lb035q02_panel_probe, |
| 168 | .remove = lb035q02_panel_remove, |
| 169 | |
| 170 | .enable = lb035q02_panel_enable, |
| 171 | .disable = lb035q02_panel_disable, |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 172 | |
| 173 | .driver = { |
| 174 | .name = "lgphilips_lb035q02_panel", |
| 175 | .owner = THIS_MODULE, |
| 176 | }, |
| 177 | }; |
| 178 | |
| 179 | static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val) |
| 180 | { |
| 181 | struct spi_message msg; |
| 182 | struct spi_transfer index_xfer = { |
| 183 | .len = 3, |
| 184 | .cs_change = 1, |
| 185 | }; |
| 186 | struct spi_transfer value_xfer = { |
| 187 | .len = 3, |
| 188 | }; |
| 189 | u8 buffer[16]; |
| 190 | |
| 191 | spi_message_init(&msg); |
| 192 | |
| 193 | /* register index */ |
| 194 | buffer[0] = 0x70; |
| 195 | buffer[1] = 0x00; |
| 196 | buffer[2] = reg & 0x7f; |
| 197 | index_xfer.tx_buf = buffer; |
| 198 | spi_message_add_tail(&index_xfer, &msg); |
| 199 | |
| 200 | /* register value */ |
| 201 | buffer[4] = 0x72; |
| 202 | buffer[5] = val >> 8; |
| 203 | buffer[6] = val; |
| 204 | value_xfer.tx_buf = buffer + 4; |
| 205 | spi_message_add_tail(&value_xfer, &msg); |
| 206 | |
| 207 | return spi_sync(spi, &msg); |
| 208 | } |
| 209 | |
| 210 | static void init_lb035q02_panel(struct spi_device *spi) |
| 211 | { |
| 212 | /* Init sequence from page 28 of the lb035q02 spec */ |
| 213 | lb035q02_write_reg(spi, 0x01, 0x6300); |
| 214 | lb035q02_write_reg(spi, 0x02, 0x0200); |
| 215 | lb035q02_write_reg(spi, 0x03, 0x0177); |
| 216 | lb035q02_write_reg(spi, 0x04, 0x04c7); |
| 217 | lb035q02_write_reg(spi, 0x05, 0xffc0); |
| 218 | lb035q02_write_reg(spi, 0x06, 0xe806); |
| 219 | lb035q02_write_reg(spi, 0x0a, 0x4008); |
| 220 | lb035q02_write_reg(spi, 0x0b, 0x0000); |
| 221 | lb035q02_write_reg(spi, 0x0d, 0x0030); |
| 222 | lb035q02_write_reg(spi, 0x0e, 0x2800); |
| 223 | lb035q02_write_reg(spi, 0x0f, 0x0000); |
| 224 | lb035q02_write_reg(spi, 0x16, 0x9f80); |
| 225 | lb035q02_write_reg(spi, 0x17, 0x0a0f); |
| 226 | lb035q02_write_reg(spi, 0x1e, 0x00c1); |
| 227 | lb035q02_write_reg(spi, 0x30, 0x0300); |
| 228 | lb035q02_write_reg(spi, 0x31, 0x0007); |
| 229 | lb035q02_write_reg(spi, 0x32, 0x0000); |
| 230 | lb035q02_write_reg(spi, 0x33, 0x0000); |
| 231 | lb035q02_write_reg(spi, 0x34, 0x0707); |
| 232 | lb035q02_write_reg(spi, 0x35, 0x0004); |
| 233 | lb035q02_write_reg(spi, 0x36, 0x0302); |
| 234 | lb035q02_write_reg(spi, 0x37, 0x0202); |
| 235 | lb035q02_write_reg(spi, 0x3a, 0x0a0d); |
| 236 | lb035q02_write_reg(spi, 0x3b, 0x0806); |
| 237 | } |
| 238 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 239 | static int lb035q02_panel_spi_probe(struct spi_device *spi) |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 240 | { |
| 241 | init_lb035q02_panel(spi); |
| 242 | return omap_dss_register_driver(&lb035q02_driver); |
| 243 | } |
| 244 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 245 | static int lb035q02_panel_spi_remove(struct spi_device *spi) |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 246 | { |
| 247 | omap_dss_unregister_driver(&lb035q02_driver); |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | static struct spi_driver lb035q02_spi_driver = { |
| 252 | .driver = { |
| 253 | .name = "lgphilips_lb035q02_panel-spi", |
| 254 | .owner = THIS_MODULE, |
| 255 | }, |
| 256 | .probe = lb035q02_panel_spi_probe, |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 257 | .remove = lb035q02_panel_spi_remove, |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 258 | }; |
| 259 | |
Axel Lin | c6d242a | 2012-01-27 16:02:54 +0800 | [diff] [blame] | 260 | module_spi_driver(lb035q02_spi_driver); |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 261 | |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 262 | MODULE_LICENSE("GPL"); |