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> |
| 23 | |
Tomi Valkeinen | a0b38cc | 2011-05-11 14:05:07 +0300 | [diff] [blame^] | 24 | #include <video/omapdss.h> |
Steve Sakoman | 7654b4d | 2011-03-05 07:58:38 -0600 | [diff] [blame] | 25 | |
| 26 | struct lb035q02_data { |
| 27 | struct mutex lock; |
| 28 | }; |
| 29 | |
| 30 | static struct omap_video_timings lb035q02_timings = { |
| 31 | .x_res = 320, |
| 32 | .y_res = 240, |
| 33 | |
| 34 | .pixel_clock = 6500, |
| 35 | |
| 36 | .hsw = 2, |
| 37 | .hfp = 20, |
| 38 | .hbp = 68, |
| 39 | |
| 40 | .vsw = 2, |
| 41 | .vfp = 4, |
| 42 | .vbp = 18, |
| 43 | }; |
| 44 | |
| 45 | static int lb035q02_panel_power_on(struct omap_dss_device *dssdev) |
| 46 | { |
| 47 | int r; |
| 48 | |
| 49 | if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) |
| 50 | return 0; |
| 51 | |
| 52 | r = omapdss_dpi_display_enable(dssdev); |
| 53 | if (r) |
| 54 | goto err0; |
| 55 | |
| 56 | if (dssdev->platform_enable) { |
| 57 | r = dssdev->platform_enable(dssdev); |
| 58 | if (r) |
| 59 | goto err1; |
| 60 | } |
| 61 | |
| 62 | return 0; |
| 63 | err1: |
| 64 | omapdss_dpi_display_disable(dssdev); |
| 65 | err0: |
| 66 | return r; |
| 67 | } |
| 68 | |
| 69 | static void lb035q02_panel_power_off(struct omap_dss_device *dssdev) |
| 70 | { |
| 71 | if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) |
| 72 | return; |
| 73 | |
| 74 | if (dssdev->platform_disable) |
| 75 | dssdev->platform_disable(dssdev); |
| 76 | |
| 77 | omapdss_dpi_display_disable(dssdev); |
| 78 | } |
| 79 | |
| 80 | static int lb035q02_panel_probe(struct omap_dss_device *dssdev) |
| 81 | { |
| 82 | struct lb035q02_data *ld; |
| 83 | int r; |
| 84 | |
| 85 | dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS | |
| 86 | OMAP_DSS_LCD_IHS; |
| 87 | dssdev->panel.timings = lb035q02_timings; |
| 88 | |
| 89 | ld = kzalloc(sizeof(*ld), GFP_KERNEL); |
| 90 | if (!ld) { |
| 91 | r = -ENOMEM; |
| 92 | goto err; |
| 93 | } |
| 94 | mutex_init(&ld->lock); |
| 95 | dev_set_drvdata(&dssdev->dev, ld); |
| 96 | return 0; |
| 97 | err: |
| 98 | return r; |
| 99 | } |
| 100 | |
| 101 | static void lb035q02_panel_remove(struct omap_dss_device *dssdev) |
| 102 | { |
| 103 | struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev); |
| 104 | |
| 105 | kfree(ld); |
| 106 | } |
| 107 | |
| 108 | static int lb035q02_panel_enable(struct omap_dss_device *dssdev) |
| 109 | { |
| 110 | struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev); |
| 111 | int r; |
| 112 | |
| 113 | mutex_lock(&ld->lock); |
| 114 | |
| 115 | r = lb035q02_panel_power_on(dssdev); |
| 116 | if (r) |
| 117 | goto err; |
| 118 | dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; |
| 119 | |
| 120 | mutex_unlock(&ld->lock); |
| 121 | return 0; |
| 122 | err: |
| 123 | mutex_unlock(&ld->lock); |
| 124 | return r; |
| 125 | } |
| 126 | |
| 127 | static void lb035q02_panel_disable(struct omap_dss_device *dssdev) |
| 128 | { |
| 129 | struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev); |
| 130 | |
| 131 | mutex_lock(&ld->lock); |
| 132 | |
| 133 | lb035q02_panel_power_off(dssdev); |
| 134 | dssdev->state = OMAP_DSS_DISPLAY_DISABLED; |
| 135 | |
| 136 | mutex_unlock(&ld->lock); |
| 137 | } |
| 138 | |
| 139 | static int lb035q02_panel_suspend(struct omap_dss_device *dssdev) |
| 140 | { |
| 141 | struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev); |
| 142 | |
| 143 | mutex_lock(&ld->lock); |
| 144 | |
| 145 | lb035q02_panel_power_off(dssdev); |
| 146 | dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED; |
| 147 | |
| 148 | mutex_unlock(&ld->lock); |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | static int lb035q02_panel_resume(struct omap_dss_device *dssdev) |
| 153 | { |
| 154 | struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev); |
| 155 | int r; |
| 156 | |
| 157 | mutex_lock(&ld->lock); |
| 158 | |
| 159 | r = lb035q02_panel_power_on(dssdev); |
| 160 | if (r) |
| 161 | goto err; |
| 162 | dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; |
| 163 | |
| 164 | mutex_unlock(&ld->lock); |
| 165 | return 0; |
| 166 | err: |
| 167 | mutex_unlock(&ld->lock); |
| 168 | return r; |
| 169 | } |
| 170 | |
| 171 | static struct omap_dss_driver lb035q02_driver = { |
| 172 | .probe = lb035q02_panel_probe, |
| 173 | .remove = lb035q02_panel_remove, |
| 174 | |
| 175 | .enable = lb035q02_panel_enable, |
| 176 | .disable = lb035q02_panel_disable, |
| 177 | .suspend = lb035q02_panel_suspend, |
| 178 | .resume = lb035q02_panel_resume, |
| 179 | |
| 180 | .driver = { |
| 181 | .name = "lgphilips_lb035q02_panel", |
| 182 | .owner = THIS_MODULE, |
| 183 | }, |
| 184 | }; |
| 185 | |
| 186 | static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val) |
| 187 | { |
| 188 | struct spi_message msg; |
| 189 | struct spi_transfer index_xfer = { |
| 190 | .len = 3, |
| 191 | .cs_change = 1, |
| 192 | }; |
| 193 | struct spi_transfer value_xfer = { |
| 194 | .len = 3, |
| 195 | }; |
| 196 | u8 buffer[16]; |
| 197 | |
| 198 | spi_message_init(&msg); |
| 199 | |
| 200 | /* register index */ |
| 201 | buffer[0] = 0x70; |
| 202 | buffer[1] = 0x00; |
| 203 | buffer[2] = reg & 0x7f; |
| 204 | index_xfer.tx_buf = buffer; |
| 205 | spi_message_add_tail(&index_xfer, &msg); |
| 206 | |
| 207 | /* register value */ |
| 208 | buffer[4] = 0x72; |
| 209 | buffer[5] = val >> 8; |
| 210 | buffer[6] = val; |
| 211 | value_xfer.tx_buf = buffer + 4; |
| 212 | spi_message_add_tail(&value_xfer, &msg); |
| 213 | |
| 214 | return spi_sync(spi, &msg); |
| 215 | } |
| 216 | |
| 217 | static void init_lb035q02_panel(struct spi_device *spi) |
| 218 | { |
| 219 | /* Init sequence from page 28 of the lb035q02 spec */ |
| 220 | lb035q02_write_reg(spi, 0x01, 0x6300); |
| 221 | lb035q02_write_reg(spi, 0x02, 0x0200); |
| 222 | lb035q02_write_reg(spi, 0x03, 0x0177); |
| 223 | lb035q02_write_reg(spi, 0x04, 0x04c7); |
| 224 | lb035q02_write_reg(spi, 0x05, 0xffc0); |
| 225 | lb035q02_write_reg(spi, 0x06, 0xe806); |
| 226 | lb035q02_write_reg(spi, 0x0a, 0x4008); |
| 227 | lb035q02_write_reg(spi, 0x0b, 0x0000); |
| 228 | lb035q02_write_reg(spi, 0x0d, 0x0030); |
| 229 | lb035q02_write_reg(spi, 0x0e, 0x2800); |
| 230 | lb035q02_write_reg(spi, 0x0f, 0x0000); |
| 231 | lb035q02_write_reg(spi, 0x16, 0x9f80); |
| 232 | lb035q02_write_reg(spi, 0x17, 0x0a0f); |
| 233 | lb035q02_write_reg(spi, 0x1e, 0x00c1); |
| 234 | lb035q02_write_reg(spi, 0x30, 0x0300); |
| 235 | lb035q02_write_reg(spi, 0x31, 0x0007); |
| 236 | lb035q02_write_reg(spi, 0x32, 0x0000); |
| 237 | lb035q02_write_reg(spi, 0x33, 0x0000); |
| 238 | lb035q02_write_reg(spi, 0x34, 0x0707); |
| 239 | lb035q02_write_reg(spi, 0x35, 0x0004); |
| 240 | lb035q02_write_reg(spi, 0x36, 0x0302); |
| 241 | lb035q02_write_reg(spi, 0x37, 0x0202); |
| 242 | lb035q02_write_reg(spi, 0x3a, 0x0a0d); |
| 243 | lb035q02_write_reg(spi, 0x3b, 0x0806); |
| 244 | } |
| 245 | |
| 246 | static int __devinit lb035q02_panel_spi_probe(struct spi_device *spi) |
| 247 | { |
| 248 | init_lb035q02_panel(spi); |
| 249 | return omap_dss_register_driver(&lb035q02_driver); |
| 250 | } |
| 251 | |
| 252 | static int __devexit lb035q02_panel_spi_remove(struct spi_device *spi) |
| 253 | { |
| 254 | omap_dss_unregister_driver(&lb035q02_driver); |
| 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | static struct spi_driver lb035q02_spi_driver = { |
| 259 | .driver = { |
| 260 | .name = "lgphilips_lb035q02_panel-spi", |
| 261 | .owner = THIS_MODULE, |
| 262 | }, |
| 263 | .probe = lb035q02_panel_spi_probe, |
| 264 | .remove = __devexit_p(lb035q02_panel_spi_remove), |
| 265 | }; |
| 266 | |
| 267 | static int __init lb035q02_panel_drv_init(void) |
| 268 | { |
| 269 | return spi_register_driver(&lb035q02_spi_driver); |
| 270 | } |
| 271 | |
| 272 | static void __exit lb035q02_panel_drv_exit(void) |
| 273 | { |
| 274 | spi_unregister_driver(&lb035q02_spi_driver); |
| 275 | } |
| 276 | |
| 277 | module_init(lb035q02_panel_drv_init); |
| 278 | module_exit(lb035q02_panel_drv_exit); |
| 279 | MODULE_LICENSE("GPL"); |