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1/*
2 *
3 * Copyright (C) 2010 Eric Bénard <eric@eukrea.com>
4 *
5 * based on board-mx51_babbage.c which is
6 * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved.
7 * Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria@canonical.com>
8 *
9 * The code contained herein is licensed under the GNU General Public
10 * License. You may obtain a copy of the GNU General Public License
11 * Version 2 or later at the following locations:
12 *
13 * http://www.opensource.org/licenses/gpl-license.html
14 * http://www.gnu.org/copyleft/gpl.html
15 */
16
17#include <linux/init.h>
18#include <linux/platform_device.h>
19#include <linux/i2c.h>
20#include <linux/i2c/tsc2007.h>
21#include <linux/gpio.h>
22#include <linux/delay.h>
23#include <linux/io.h>
24#include <linux/interrupt.h>
25#include <linux/i2c-gpio.h>
26#include <linux/spi/spi.h>
27#include <linux/can/platform/mcp251x.h>
28
29#include <asm/setup.h>
30#include <asm/mach-types.h>
31#include <asm/mach/arch.h>
32#include <asm/mach/time.h>
33
34#include "common.h"
35#include "devices-imx51.h"
36#include "eukrea-baseboards.h"
37#include "hardware.h"
38#include "iomux-mx51.h"
39
40#define USBH1_RST IMX_GPIO_NR(2, 28)
41#define ETH_RST IMX_GPIO_NR(2, 31)
42#define TSC2007_IRQGPIO_REV2 IMX_GPIO_NR(3, 12)
43#define TSC2007_IRQGPIO_REV3 IMX_GPIO_NR(4, 0)
44#define CAN_IRQGPIO IMX_GPIO_NR(1, 1)
45#define CAN_RST IMX_GPIO_NR(4, 15)
46#define CAN_NCS IMX_GPIO_NR(4, 24)
47#define CAN_RXOBF_REV2 IMX_GPIO_NR(1, 4)
48#define CAN_RXOBF_REV3 IMX_GPIO_NR(3, 12)
49#define CAN_RX1BF IMX_GPIO_NR(1, 6)
50#define CAN_TXORTS IMX_GPIO_NR(1, 7)
51#define CAN_TX1RTS IMX_GPIO_NR(1, 8)
52#define CAN_TX2RTS IMX_GPIO_NR(1, 9)
53#define I2C_SCL IMX_GPIO_NR(4, 16)
54#define I2C_SDA IMX_GPIO_NR(4, 17)
55
56/* USB_CTRL_1 */
57#define MX51_USB_CTRL_1_OFFSET 0x10
58#define MX51_USB_CTRL_UH1_EXT_CLK_EN (1 << 25)
59
60#define MX51_USB_PLLDIV_12_MHZ 0x00
61#define MX51_USB_PLL_DIV_19_2_MHZ 0x01
62#define MX51_USB_PLL_DIV_24_MHZ 0x02
63
64static iomux_v3_cfg_t eukrea_cpuimx51sd_pads[] = {
65 /* UART1 */
66 MX51_PAD_UART1_RXD__UART1_RXD,
67 MX51_PAD_UART1_TXD__UART1_TXD,
68 MX51_PAD_UART1_RTS__UART1_RTS,
69 MX51_PAD_UART1_CTS__UART1_CTS,
70
71 /* USB HOST1 */
72 MX51_PAD_USBH1_CLK__USBH1_CLK,
73 MX51_PAD_USBH1_DIR__USBH1_DIR,
74 MX51_PAD_USBH1_NXT__USBH1_NXT,
75 MX51_PAD_USBH1_DATA0__USBH1_DATA0,
76 MX51_PAD_USBH1_DATA1__USBH1_DATA1,
77 MX51_PAD_USBH1_DATA2__USBH1_DATA2,
78 MX51_PAD_USBH1_DATA3__USBH1_DATA3,
79 MX51_PAD_USBH1_DATA4__USBH1_DATA4,
80 MX51_PAD_USBH1_DATA5__USBH1_DATA5,
81 MX51_PAD_USBH1_DATA6__USBH1_DATA6,
82 MX51_PAD_USBH1_DATA7__USBH1_DATA7,
83 MX51_PAD_USBH1_STP__USBH1_STP,
84 MX51_PAD_EIM_CS3__GPIO2_28, /* PHY nRESET */
85
86 /* FEC */
87 MX51_PAD_EIM_DTACK__GPIO2_31, /* PHY nRESET */
88
89 /* HSI2C */
90 MX51_PAD_I2C1_CLK__GPIO4_16,
91 MX51_PAD_I2C1_DAT__GPIO4_17,
92
93 /* I2C1 */
94 MX51_PAD_SD2_CMD__I2C1_SCL,
95 MX51_PAD_SD2_CLK__I2C1_SDA,
96
97 /* CAN */
98 MX51_PAD_CSPI1_MOSI__ECSPI1_MOSI,
99 MX51_PAD_CSPI1_MISO__ECSPI1_MISO,
100 MX51_PAD_CSPI1_SCLK__ECSPI1_SCLK,
101 MX51_PAD_CSPI1_SS0__GPIO4_24, /* nCS */
102 MX51_PAD_CSI2_PIXCLK__GPIO4_15, /* nReset */
103 MX51_PAD_GPIO1_1__GPIO1_1, /* IRQ */
104 MX51_PAD_GPIO1_4__GPIO1_4, /* Control signals */
105 MX51_PAD_GPIO1_6__GPIO1_6,
106 MX51_PAD_GPIO1_7__GPIO1_7,
107 MX51_PAD_GPIO1_8__GPIO1_8,
108 MX51_PAD_GPIO1_9__GPIO1_9,
109
110 /* Touchscreen */
111 /* IRQ */
112 NEW_PAD_CTRL(MX51_PAD_GPIO_NAND__GPIO_NAND, PAD_CTL_PUS_22K_UP |
113 PAD_CTL_PKE | PAD_CTL_SRE_FAST |
114 PAD_CTL_DSE_HIGH | PAD_CTL_PUE | PAD_CTL_HYS),
115 NEW_PAD_CTRL(MX51_PAD_NANDF_D8__GPIO4_0, PAD_CTL_PUS_22K_UP |
116 PAD_CTL_PKE | PAD_CTL_SRE_FAST |
117 PAD_CTL_DSE_HIGH | PAD_CTL_PUE | PAD_CTL_HYS),
118};
119
120static const struct imxuart_platform_data uart_pdata __initconst = {
121 .flags = IMXUART_HAVE_RTSCTS,
122};
123
124static int tsc2007_get_pendown_state(struct device *dev)
125{
126 if (mx51_revision() < IMX_CHIP_REVISION_3_0)
127 return !gpio_get_value(TSC2007_IRQGPIO_REV2);
128 else
129 return !gpio_get_value(TSC2007_IRQGPIO_REV3);
130}
131
132static struct tsc2007_platform_data tsc2007_info = {
133 .model = 2007,
134 .x_plate_ohms = 180,
135 .get_pendown_state = tsc2007_get_pendown_state,
136};
137
138static struct i2c_board_info eukrea_cpuimx51sd_i2c_devices[] = {
139 {
140 I2C_BOARD_INFO("pcf8563", 0x51),
141 }, {
142 I2C_BOARD_INFO("tsc2007", 0x49),
143 .platform_data = &tsc2007_info,
144 },
145};
146
147static const struct mxc_nand_platform_data
148 eukrea_cpuimx51sd_nand_board_info __initconst = {
149 .width = 1,
150 .hw_ecc = 1,
151 .flash_bbt = 1,
152};
153
154/* This function is board specific as the bit mask for the plldiv will also
155be different for other Freescale SoCs, thus a common bitmask is not
156possible and cannot get place in /plat-mxc/ehci.c.*/
157static int initialize_otg_port(struct platform_device *pdev)
158{
159 u32 v;
160 void __iomem *usb_base;
161 void __iomem *usbother_base;
162
163 usb_base = ioremap(MX51_USB_OTG_BASE_ADDR, SZ_4K);
164 if (!usb_base)
165 return -ENOMEM;
166 usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
167
168 /* Set the PHY clock to 19.2MHz */
169 v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
170 v &= ~MX5_USB_UTMI_PHYCTRL1_PLLDIV_MASK;
171 v |= MX51_USB_PLL_DIV_19_2_MHZ;
172 __raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
173 iounmap(usb_base);
174
175 mdelay(10);
176
177 return mx51_initialize_usb_hw(0, MXC_EHCI_INTERNAL_PHY);
178}
179
180static int initialize_usbh1_port(struct platform_device *pdev)
181{
182 u32 v;
183 void __iomem *usb_base;
184 void __iomem *usbother_base;
185
186 usb_base = ioremap(MX51_USB_OTG_BASE_ADDR, SZ_4K);
187 if (!usb_base)
188 return -ENOMEM;
189 usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
190
191 /* The clock for the USBH1 ULPI port will come from the PHY. */
192 v = __raw_readl(usbother_base + MX51_USB_CTRL_1_OFFSET);
193 __raw_writel(v | MX51_USB_CTRL_UH1_EXT_CLK_EN,
194 usbother_base + MX51_USB_CTRL_1_OFFSET);
195 iounmap(usb_base);
196
197 mdelay(10);
198
199 return mx51_initialize_usb_hw(1, MXC_EHCI_POWER_PINS_ENABLED |
200 MXC_EHCI_ITC_NO_THRESHOLD);
201}
202
203static const struct mxc_usbh_platform_data dr_utmi_config __initconst = {
204 .init = initialize_otg_port,
205 .portsc = MXC_EHCI_UTMI_16BIT,
206};
207
208static const struct fsl_usb2_platform_data usb_pdata __initconst = {
209 .operating_mode = FSL_USB2_DR_DEVICE,
210 .phy_mode = FSL_USB2_PHY_UTMI_WIDE,
211};
212
213static const struct mxc_usbh_platform_data usbh1_config __initconst = {
214 .init = initialize_usbh1_port,
215 .portsc = MXC_EHCI_MODE_ULPI,
216};
217
218static bool otg_mode_host __initdata;
219
220static int __init eukrea_cpuimx51sd_otg_mode(char *options)
221{
222 if (!strcmp(options, "host"))
223 otg_mode_host = true;
224 else if (!strcmp(options, "device"))
225 otg_mode_host = false;
226 else
227 pr_info("otg_mode neither \"host\" nor \"device\". "
228 "Defaulting to device\n");
229 return 1;
230}
231__setup("otg_mode=", eukrea_cpuimx51sd_otg_mode);
232
233static struct i2c_gpio_platform_data pdata = {
234 .sda_pin = I2C_SDA,
235 .sda_is_open_drain = 0,
236 .scl_pin = I2C_SCL,
237 .scl_is_open_drain = 0,
238 .udelay = 2,
239};
240
241static struct platform_device hsi2c_gpio_device = {
242 .name = "i2c-gpio",
243 .id = 0,
244 .dev.platform_data = &pdata,
245};
246
247static struct mcp251x_platform_data mcp251x_info = {
248 .oscillator_frequency = 24E6,
249};
250
251static struct spi_board_info cpuimx51sd_spi_device[] = {
252 {
253 .modalias = "mcp2515",
254 .max_speed_hz = 10000000,
255 .bus_num = 0,
256 .mode = SPI_MODE_0,
257 .chip_select = 0,
258 .platform_data = &mcp251x_info,
259 /* irq number is run-time assigned */
260 },
261};
262
263static int cpuimx51sd_spi1_cs[] = {
264 CAN_NCS,
265};
266
267static const struct spi_imx_master cpuimx51sd_ecspi1_pdata __initconst = {
268 .chipselect = cpuimx51sd_spi1_cs,
269 .num_chipselect = ARRAY_SIZE(cpuimx51sd_spi1_cs),
270};
271
272static struct platform_device *rev2_platform_devices[] __initdata = {
273 &hsi2c_gpio_device,
274};
275
276static const struct imxi2c_platform_data cpuimx51sd_i2c_data __initconst = {
277 .bitrate = 100000,
278};
279
280static void __init eukrea_cpuimx51sd_init(void)
281{
282 imx51_soc_init();
283
284 mxc_iomux_v3_setup_multiple_pads(eukrea_cpuimx51sd_pads,
285 ARRAY_SIZE(eukrea_cpuimx51sd_pads));
286
287 imx51_add_imx_uart(0, &uart_pdata);
288 imx51_add_mxc_nand(&eukrea_cpuimx51sd_nand_board_info);
289 imx51_add_imx2_wdt(0);
290
291 gpio_request(ETH_RST, "eth_rst");
292 gpio_set_value(ETH_RST, 1);
293 imx51_add_fec(NULL);
294
295 gpio_request(CAN_IRQGPIO, "can_irq");
296 gpio_direction_input(CAN_IRQGPIO);
297 gpio_free(CAN_IRQGPIO);
298 gpio_request(CAN_NCS, "can_ncs");
299 gpio_direction_output(CAN_NCS, 1);
300 gpio_free(CAN_NCS);
301 gpio_request(CAN_RST, "can_rst");
302 gpio_direction_output(CAN_RST, 0);
303 msleep(20);
304 gpio_set_value(CAN_RST, 1);
305 imx51_add_ecspi(0, &cpuimx51sd_ecspi1_pdata);
306 cpuimx51sd_spi_device[0].irq = gpio_to_irq(CAN_IRQGPIO);
307 spi_register_board_info(cpuimx51sd_spi_device,
308 ARRAY_SIZE(cpuimx51sd_spi_device));
309
310 if (mx51_revision() < IMX_CHIP_REVISION_3_0) {
311 eukrea_cpuimx51sd_i2c_devices[1].irq =
312 gpio_to_irq(TSC2007_IRQGPIO_REV2),
313 platform_add_devices(rev2_platform_devices,
314 ARRAY_SIZE(rev2_platform_devices));
315 gpio_request(TSC2007_IRQGPIO_REV2, "tsc2007_irq");
316 gpio_direction_input(TSC2007_IRQGPIO_REV2);
317 gpio_free(TSC2007_IRQGPIO_REV2);
318 } else {
319 eukrea_cpuimx51sd_i2c_devices[1].irq =
320 gpio_to_irq(TSC2007_IRQGPIO_REV3),
321 imx51_add_imx_i2c(0, &cpuimx51sd_i2c_data);
322 gpio_request(TSC2007_IRQGPIO_REV3, "tsc2007_irq");
323 gpio_direction_input(TSC2007_IRQGPIO_REV3);
324 gpio_free(TSC2007_IRQGPIO_REV3);
325 }
326
327 i2c_register_board_info(0, eukrea_cpuimx51sd_i2c_devices,
328 ARRAY_SIZE(eukrea_cpuimx51sd_i2c_devices));
329
330 if (otg_mode_host)
331 imx51_add_mxc_ehci_otg(&dr_utmi_config);
332 else {
333 initialize_otg_port(NULL);
334 imx51_add_fsl_usb2_udc(&usb_pdata);
335 }
336
337 gpio_request(USBH1_RST, "usb_rst");
338 gpio_direction_output(USBH1_RST, 0);
339 msleep(20);
340 gpio_set_value(USBH1_RST, 1);
341 imx51_add_mxc_ehci_hs(1, &usbh1_config);
342
343#ifdef CONFIG_MACH_EUKREA_MBIMXSD51_BASEBOARD
344 eukrea_mbimxsd51_baseboard_init();
345#endif
346}
347
348static void __init eukrea_cpuimx51sd_timer_init(void)
349{
350 mx51_clocks_init(32768, 24000000, 22579200, 0);
351}
352
353MACHINE_START(EUKREA_CPUIMX51SD, "Eukrea CPUIMX51SD")
354 /* Maintainer: Eric Bénard <eric@eukrea.com> */
355 .atag_offset = 0x100,
356 .map_io = mx51_map_io,
357 .init_early = imx51_init_early,
358 .init_irq = mx51_init_irq,
359 .handle_irq = imx51_handle_irq,
360 .init_time = eukrea_cpuimx51sd_timer_init,
361 .init_machine = eukrea_cpuimx51sd_init,
362 .init_late = imx51_init_late,
363 .restart = mxc_restart,
364MACHINE_END