1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * SanDisk Sansa Fuze Plus board
4 *
5 * Copyright (C) 2013 Marek Vasut <marex@denx.de>
6 *
7 * Hardware investigation done by:
8 *
9 * Amaury Pouly <amaury.pouly@gmail.com>
10 */
11
12 #include <common.h>
13 #include <errno.h>
14 #include <asm/gpio.h>
15 #include <asm/io.h>
16 #include <asm/arch/iomux-mx23.h>
17 #include <asm/arch/imx-regs.h>
18 #include <asm/arch/clock.h>
19 #include <asm/arch/sys_proto.h>
20
21 DECLARE_GLOBAL_DATA_PTR;
22
23 /*
24 * Functions
25 */
board_early_init_f(void)26 int board_early_init_f(void)
27 {
28 /* IO0 clock at 480MHz */
29 mxs_set_ioclk(MXC_IOCLK0, 480000);
30
31 /* SSP0 clock at 96MHz */
32 mxs_set_sspclk(MXC_SSPCLK0, 96000, 0);
33
34 return 0;
35 }
36
dram_init(void)37 int dram_init(void)
38 {
39 return mxs_dram_init();
40 }
41
42 #ifdef CONFIG_CMD_MMC
xfi3_mmc_cd(int id)43 static int xfi3_mmc_cd(int id)
44 {
45 switch (id) {
46 case 0:
47 /* The SSP_DETECT is inverted on this board. */
48 return gpio_get_value(MX23_PAD_SSP1_DETECT__GPIO_2_1);
49 case 1:
50 /* Internal eMMC always present */
51 return 1;
52 default:
53 return 0;
54 }
55 }
56
board_mmc_init(bd_t * bis)57 int board_mmc_init(bd_t *bis)
58 {
59 int ret;
60
61 /* MicroSD slot */
62 gpio_direction_input(MX23_PAD_SSP1_DETECT__GPIO_2_1);
63 gpio_direction_output(MX23_PAD_GPMI_D08__GPIO_0_8, 0);
64 ret = mxsmmc_initialize(bis, 0, NULL, xfi3_mmc_cd);
65 if (ret)
66 return ret;
67
68 /* Internal eMMC */
69 gpio_direction_output(MX23_PAD_PWM3__GPIO_1_29, 0);
70 ret = mxsmmc_initialize(bis, 1, NULL, xfi3_mmc_cd);
71
72 return ret;
73 }
74 #endif
75
76 #ifdef CONFIG_VIDEO_MXS
77 #define MUX_CONFIG_LCD (MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL)
78 const iomux_cfg_t iomux_lcd_gpio[] = {
79 MX23_PAD_LCD_D00__GPIO_1_0 | MUX_CONFIG_LCD,
80 MX23_PAD_LCD_D01__GPIO_1_1 | MUX_CONFIG_LCD,
81 MX23_PAD_LCD_D02__GPIO_1_2 | MUX_CONFIG_LCD,
82 MX23_PAD_LCD_D03__GPIO_1_3 | MUX_CONFIG_LCD,
83 MX23_PAD_LCD_D04__GPIO_1_4 | MUX_CONFIG_LCD,
84 MX23_PAD_LCD_D05__GPIO_1_5 | MUX_CONFIG_LCD,
85 MX23_PAD_LCD_D06__GPIO_1_6 | MUX_CONFIG_LCD,
86 MX23_PAD_LCD_D07__GPIO_1_7 | MUX_CONFIG_LCD,
87 MX23_PAD_LCD_D08__GPIO_1_8 | MUX_CONFIG_LCD,
88 MX23_PAD_LCD_D09__GPIO_1_9 | MUX_CONFIG_LCD,
89 MX23_PAD_LCD_D10__GPIO_1_10 | MUX_CONFIG_LCD,
90 MX23_PAD_LCD_D11__GPIO_1_11 | MUX_CONFIG_LCD,
91 MX23_PAD_LCD_D12__GPIO_1_12 | MUX_CONFIG_LCD,
92 MX23_PAD_LCD_D13__GPIO_1_13 | MUX_CONFIG_LCD,
93 MX23_PAD_LCD_D14__GPIO_1_14 | MUX_CONFIG_LCD,
94 MX23_PAD_LCD_D15__GPIO_1_15 | MUX_CONFIG_LCD,
95 MX23_PAD_LCD_D16__GPIO_1_16 | MUX_CONFIG_LCD,
96 MX23_PAD_LCD_D17__GPIO_1_17 | MUX_CONFIG_LCD,
97 MX23_PAD_LCD_RESET__GPIO_1_18 | MUX_CONFIG_LCD,
98 MX23_PAD_LCD_RS__GPIO_1_19 | MUX_CONFIG_LCD,
99 MX23_PAD_LCD_WR__GPIO_1_20 | MUX_CONFIG_LCD,
100 MX23_PAD_LCD_CS__GPIO_1_21 | MUX_CONFIG_LCD,
101 MX23_PAD_LCD_ENABLE__GPIO_1_23 | MUX_CONFIG_LCD,
102 };
103
104 const iomux_cfg_t iomux_lcd_lcd[] = {
105 MX23_PAD_LCD_D00__LCD_D00 | MUX_CONFIG_LCD,
106 MX23_PAD_LCD_D01__LCD_D01 | MUX_CONFIG_LCD,
107 MX23_PAD_LCD_D02__LCD_D02 | MUX_CONFIG_LCD,
108 MX23_PAD_LCD_D03__LCD_D03 | MUX_CONFIG_LCD,
109 MX23_PAD_LCD_D04__LCD_D04 | MUX_CONFIG_LCD,
110 MX23_PAD_LCD_D05__LCD_D05 | MUX_CONFIG_LCD,
111 MX23_PAD_LCD_D06__LCD_D06 | MUX_CONFIG_LCD,
112 MX23_PAD_LCD_D07__LCD_D07 | MUX_CONFIG_LCD,
113 MX23_PAD_LCD_D08__LCD_D08 | MUX_CONFIG_LCD,
114 MX23_PAD_LCD_D09__LCD_D09 | MUX_CONFIG_LCD,
115 MX23_PAD_LCD_D10__LCD_D10 | MUX_CONFIG_LCD,
116 MX23_PAD_LCD_D11__LCD_D11 | MUX_CONFIG_LCD,
117 MX23_PAD_LCD_D12__LCD_D12 | MUX_CONFIG_LCD,
118 MX23_PAD_LCD_D13__LCD_D13 | MUX_CONFIG_LCD,
119 MX23_PAD_LCD_D14__LCD_D14 | MUX_CONFIG_LCD,
120 MX23_PAD_LCD_D15__LCD_D15 | MUX_CONFIG_LCD,
121 MX23_PAD_LCD_D16__LCD_D16 | MUX_CONFIG_LCD,
122 MX23_PAD_LCD_D17__LCD_D17 | MUX_CONFIG_LCD,
123 MX23_PAD_LCD_RESET__LCD_RESET | MUX_CONFIG_LCD,
124 MX23_PAD_LCD_RS__LCD_RS | MUX_CONFIG_LCD,
125 MX23_PAD_LCD_WR__LCD_WR | MUX_CONFIG_LCD,
126 MX23_PAD_LCD_CS__LCD_CS | MUX_CONFIG_LCD,
127 MX23_PAD_LCD_ENABLE__LCD_ENABLE | MUX_CONFIG_LCD,
128 MX23_PAD_LCD_VSYNC__LCD_VSYNC | MUX_CONFIG_LCD,
129 };
130
mxsfb_read_register(uint32_t reg,uint32_t * value)131 static int mxsfb_read_register(uint32_t reg, uint32_t *value)
132 {
133 iomux_cfg_t mux;
134 uint32_t val = 0;
135 int i;
136
137 /* Mangle the register offset. */
138 reg = ((reg & 0xff) << 1) | (((reg >> 8) & 0xff) << 10);
139
140 /*
141 * The SmartLCD interface on MX233 can only do WRITE operation
142 * via the LCDIF controller. Implement the READ operation by
143 * fiddling with bits.
144 */
145 mxs_iomux_setup_multiple_pads(iomux_lcd_gpio,
146 ARRAY_SIZE(iomux_lcd_gpio));
147
148 gpio_direction_output(MX23_PAD_LCD_RS__GPIO_1_19, 1);
149 gpio_direction_output(MX23_PAD_LCD_CS__GPIO_1_21, 1);
150 gpio_direction_output(MX23_PAD_LCD_WR__GPIO_1_20, 1);
151 gpio_direction_output(MX23_PAD_LCD_ENABLE__GPIO_1_23, 1);
152
153 for (i = 0; i < 18; i++) {
154 mux = MXS_IOMUX_PAD_NAKED(1, i, PAD_MUXSEL_GPIO);
155 gpio_direction_output(mux, 0);
156 }
157
158 udelay(2);
159 gpio_direction_output(MX23_PAD_LCD_RS__GPIO_1_19, 0);
160 udelay(1);
161 gpio_direction_output(MX23_PAD_LCD_CS__GPIO_1_21, 0);
162 udelay(1);
163 gpio_direction_output(MX23_PAD_LCD_WR__GPIO_1_20, 0);
164 udelay(1);
165
166 for (i = 0; i < 18; i++) {
167 mux = MXS_IOMUX_PAD_NAKED(1, i, PAD_MUXSEL_GPIO);
168 gpio_direction_output(mux, (reg >> i) & 1);
169 }
170 udelay(1);
171
172 gpio_direction_output(MX23_PAD_LCD_WR__GPIO_1_20, 1);
173 udelay(3);
174
175 for (i = 0; i < 18; i++) {
176 mux = MXS_IOMUX_PAD_NAKED(1, i, PAD_MUXSEL_GPIO);
177 gpio_direction_input(mux);
178 }
179 udelay(2);
180
181 gpio_direction_output(MX23_PAD_LCD_ENABLE__GPIO_1_23, 0);
182 udelay(1);
183 gpio_direction_output(MX23_PAD_LCD_RS__GPIO_1_19, 1);
184 udelay(1);
185 gpio_direction_output(MX23_PAD_LCD_ENABLE__GPIO_1_23, 1);
186 udelay(3);
187 gpio_direction_output(MX23_PAD_LCD_ENABLE__GPIO_1_23, 0);
188 udelay(2);
189
190 for (i = 0; i < 18; i++) {
191 mux = MXS_IOMUX_PAD_NAKED(1, i, PAD_MUXSEL_GPIO);
192 val |= !!gpio_get_value(mux) << i;
193 }
194 udelay(1);
195
196 gpio_direction_output(MX23_PAD_LCD_ENABLE__GPIO_1_23, 1);
197 udelay(1);
198 gpio_direction_output(MX23_PAD_LCD_CS__GPIO_1_21, 1);
199 udelay(1);
200
201 mxs_iomux_setup_multiple_pads(iomux_lcd_lcd,
202 ARRAY_SIZE(iomux_lcd_lcd));
203
204 /* Demangle the register value. */
205 *value = ((val >> 1) & 0xff) | ((val >> 2) & 0xff00);
206
207 writel(val, 0x2000);
208 return 0;
209 }
210
mxsfb_write_byte(uint32_t payload,const unsigned int data)211 static int mxsfb_write_byte(uint32_t payload, const unsigned int data)
212 {
213 struct mxs_lcdif_regs *regs = (struct mxs_lcdif_regs *)MXS_LCDIF_BASE;
214 const unsigned int timeout = 0x10000;
215
216 /* What is going on here I do not know. FIXME */
217 payload = ((payload & 0xff) << 1) | (((payload >> 8) & 0xff) << 10);
218
219 if (mxs_wait_mask_clr(®s->hw_lcdif_ctrl_reg, LCDIF_CTRL_RUN,
220 timeout))
221 return -ETIMEDOUT;
222
223 writel((1 << LCDIF_TRANSFER_COUNT_V_COUNT_OFFSET) |
224 (1 << LCDIF_TRANSFER_COUNT_H_COUNT_OFFSET),
225 ®s->hw_lcdif_transfer_count);
226
227 writel(LCDIF_CTRL_DATA_SELECT | LCDIF_CTRL_RUN,
228 ®s->hw_lcdif_ctrl_clr);
229
230 if (data)
231 writel(LCDIF_CTRL_DATA_SELECT, ®s->hw_lcdif_ctrl_set);
232
233 writel(LCDIF_CTRL_RUN, ®s->hw_lcdif_ctrl_set);
234
235 if (mxs_wait_mask_clr(®s->hw_lcdif_lcdif_stat_reg, 1 << 29,
236 timeout))
237 return -ETIMEDOUT;
238
239 writel(payload, ®s->hw_lcdif_data);
240 return mxs_wait_mask_clr(®s->hw_lcdif_ctrl_reg, LCDIF_CTRL_RUN,
241 timeout);
242 }
243
mxsfb_write_register(uint32_t reg,uint32_t data)244 static void mxsfb_write_register(uint32_t reg, uint32_t data)
245 {
246 mxsfb_write_byte(reg, 0);
247 mxsfb_write_byte(data, 1);
248 }
249
250 static const struct {
251 uint8_t reg;
252 uint8_t delay;
253 uint16_t val;
254 } lcd_regs[] = {
255 { 0xe5, 0 , 0x78f0 },
256 { 0xe3, 0 , 0x3008 },
257 { 0xe7, 0 , 0x0012 },
258 { 0xef, 0 , 0x1231 },
259 { 0x00, 0 , 0x0001 },
260 { 0x01, 0 , 0x0100 },
261 { 0x02, 0 , 0x0700 },
262 { 0x03, 0 , 0x1030 },
263 { 0x04, 0 , 0x0000 },
264 { 0x08, 0 , 0x0207 },
265 { 0x09, 0 , 0x0000 },
266 { 0x0a, 0 , 0x0000 },
267 { 0x0c, 0 , 0x0000 },
268 { 0x0d, 0 , 0x0000 },
269 { 0x0f, 0 , 0x0000 },
270 { 0x10, 0 , 0x0000 },
271 { 0x11, 0 , 0x0007 },
272 { 0x12, 0 , 0x0000 },
273 { 0x13, 20 , 0x0000 },
274 /* Wait 20 mS here. */
275 { 0x10, 0 , 0x1290 },
276 { 0x11, 50 , 0x0007 },
277 /* Wait 50 mS here. */
278 { 0x12, 50 , 0x0019 },
279 /* Wait 50 mS here. */
280 { 0x13, 0 , 0x1700 },
281 { 0x29, 50 , 0x0014 },
282 /* Wait 50 mS here. */
283 { 0x20, 0 , 0x0000 },
284 { 0x21, 0 , 0x0000 },
285 { 0x30, 0 , 0x0504 },
286 { 0x31, 0 , 0x0007 },
287 { 0x32, 0 , 0x0006 },
288 { 0x35, 0 , 0x0106 },
289 { 0x36, 0 , 0x0202 },
290 { 0x37, 0 , 0x0504 },
291 { 0x38, 0 , 0x0500 },
292 { 0x39, 0 , 0x0706 },
293 { 0x3c, 0 , 0x0204 },
294 { 0x3d, 0 , 0x0202 },
295 { 0x50, 0 , 0x0000 },
296 { 0x51, 0 , 0x00ef },
297 { 0x52, 0 , 0x0000 },
298 { 0x53, 0 , 0x013f },
299 { 0x60, 0 , 0xa700 },
300 { 0x61, 0 , 0x0001 },
301 { 0x6a, 0 , 0x0000 },
302 { 0x2b, 50 , 0x000d },
303 /* Wait 50 mS here. */
304 { 0x90, 0 , 0x0011 },
305 { 0x92, 0 , 0x0600 },
306 { 0x93, 0 , 0x0003 },
307 { 0x95, 0 , 0x0110 },
308 { 0x97, 0 , 0x0000 },
309 { 0x98, 0 , 0x0000 },
310 { 0x07, 0 , 0x0173 },
311 };
312
board_mxsfb_system_setup(void)313 void board_mxsfb_system_setup(void)
314 {
315 struct mxs_lcdif_regs *regs = (struct mxs_lcdif_regs *)MXS_LCDIF_BASE;
316 uint32_t id;
317 int i;
318
319 /* Switch the LCDIF into System-Mode */
320 writel(LCDIF_CTRL_LCDIF_MASTER | LCDIF_CTRL_DOTCLK_MODE |
321 LCDIF_CTRL_BYPASS_COUNT, ®s->hw_lcdif_ctrl_clr);
322
323 /* To program the LCD, switch to 18bit bus + 18bit data. */
324 clrsetbits_le32(®s->hw_lcdif_ctrl,
325 LCDIF_CTRL_WORD_LENGTH_MASK | LCDIF_CTRL_LCD_DATABUS_WIDTH_MASK,
326 LCDIF_CTRL_WORD_LENGTH_18BIT |
327 LCDIF_CTRL_LCD_DATABUS_WIDTH_18BIT);
328
329 mxsfb_read_register(0, &id);
330 writel(id, 0x2004);
331
332 /* Restart the SmartLCD controller */
333 mdelay(50);
334 writel(1, ®s->hw_lcdif_ctrl1_set);
335 mdelay(50);
336 writel(1, ®s->hw_lcdif_ctrl1_clr);
337 mdelay(50);
338 writel(1, ®s->hw_lcdif_ctrl1_set);
339 mdelay(50);
340
341 /* Program the SmartLCD controller */
342 writel(LCDIF_CTRL1_RECOVER_ON_UNDERFLOW, ®s->hw_lcdif_ctrl1_set);
343
344 writel((0x02 << LCDIF_TIMING_CMD_HOLD_OFFSET) |
345 (0x02 << LCDIF_TIMING_CMD_SETUP_OFFSET) |
346 (0x02 << LCDIF_TIMING_DATA_HOLD_OFFSET) |
347 (0x01 << LCDIF_TIMING_DATA_SETUP_OFFSET),
348 ®s->hw_lcdif_timing);
349
350 /*
351 * ILI9325 init and configuration sequence.
352 */
353 for (i = 0; i < ARRAY_SIZE(lcd_regs); i++) {
354 mxsfb_write_register(lcd_regs[i].reg, lcd_regs[i].val);
355 if (lcd_regs[i].delay)
356 mdelay(lcd_regs[i].delay);
357 }
358 /* Turn on Framebuffer Upload Mode */
359 mxsfb_write_byte(0x22, 0);
360
361 writel(LCDIF_CTRL_LCDIF_MASTER | LCDIF_CTRL_DATA_SELECT,
362 ®s->hw_lcdif_ctrl_set);
363
364 /* Operate the framebuffer in 16bit mode. */
365 clrsetbits_le32(®s->hw_lcdif_ctrl,
366 LCDIF_CTRL_WORD_LENGTH_MASK | LCDIF_CTRL_LCD_DATABUS_WIDTH_MASK,
367 LCDIF_CTRL_WORD_LENGTH_16BIT |
368 LCDIF_CTRL_LCD_DATABUS_WIDTH_18BIT);
369 }
370 #endif
371
board_init(void)372 int board_init(void)
373 {
374 /* Adress of boot parameters */
375 gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
376
377 /* Turn on PWM backlight */
378 gpio_direction_output(MX23_PAD_PWM2__GPIO_1_28, 1);
379
380 return 0;
381 }
382
board_eth_init(bd_t * bis)383 int board_eth_init(bd_t *bis)
384 {
385 usb_eth_initialize(bis);
386 return 0;
387 }
388