1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
|
/*
* Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria@canonical.com>
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/fsl_devices.h>
#include <linux/fec.h>
#include <mach/common.h>
#include <mach/hardware.h>
#include <mach/iomux-mx51.h>
#include <mach/mxc_ehci.h>
#include <asm/irq.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include "devices-imx51.h"
#include "devices.h"
#define BABBAGE_USB_HUB_RESET (0*32 + 7) /* GPIO_1_7 */
#define BABBAGE_USBH1_STP (0*32 + 27) /* GPIO_1_27 */
#define BABBAGE_PHY_RESET (1*32 + 5) /* GPIO_2_5 */
#define BABBAGE_FEC_PHY_RESET (1*32 + 14) /* GPIO_2_14 */
/* USB_CTRL_1 */
#define MX51_USB_CTRL_1_OFFSET 0x10
#define MX51_USB_CTRL_UH1_EXT_CLK_EN (1 << 25)
#define MX51_USB_PLLDIV_12_MHZ 0x00
#define MX51_USB_PLL_DIV_19_2_MHZ 0x01
#define MX51_USB_PLL_DIV_24_MHZ 0x02
static struct pad_desc mx51babbage_pads[] = {
/* UART1 */
MX51_PAD_UART1_RXD__UART1_RXD,
MX51_PAD_UART1_TXD__UART1_TXD,
MX51_PAD_UART1_RTS__UART1_RTS,
MX51_PAD_UART1_CTS__UART1_CTS,
/* UART2 */
MX51_PAD_UART2_RXD__UART2_RXD,
MX51_PAD_UART2_TXD__UART2_TXD,
/* UART3 */
MX51_PAD_EIM_D25__UART3_RXD,
MX51_PAD_EIM_D26__UART3_TXD,
MX51_PAD_EIM_D27__UART3_RTS,
MX51_PAD_EIM_D24__UART3_CTS,
/* I2C1 */
MX51_PAD_EIM_D16__I2C1_SDA,
MX51_PAD_EIM_D19__I2C1_SCL,
/* I2C2 */
MX51_PAD_KEY_COL4__I2C2_SCL,
MX51_PAD_KEY_COL5__I2C2_SDA,
/* HSI2C */
MX51_PAD_I2C1_CLK__HSI2C_CLK,
MX51_PAD_I2C1_DAT__HSI2C_DAT,
/* USB HOST1 */
MX51_PAD_USBH1_CLK__USBH1_CLK,
MX51_PAD_USBH1_DIR__USBH1_DIR,
MX51_PAD_USBH1_NXT__USBH1_NXT,
MX51_PAD_USBH1_DATA0__USBH1_DATA0,
MX51_PAD_USBH1_DATA1__USBH1_DATA1,
MX51_PAD_USBH1_DATA2__USBH1_DATA2,
MX51_PAD_USBH1_DATA3__USBH1_DATA3,
MX51_PAD_USBH1_DATA4__USBH1_DATA4,
MX51_PAD_USBH1_DATA5__USBH1_DATA5,
MX51_PAD_USBH1_DATA6__USBH1_DATA6,
MX51_PAD_USBH1_DATA7__USBH1_DATA7,
/* USB HUB reset line*/
MX51_PAD_GPIO_1_7__GPIO_1_7,
/* FEC */
MX51_PAD_EIM_EB2__FEC_MDIO,
MX51_PAD_EIM_EB3__FEC_RDAT1,
MX51_PAD_EIM_CS2__FEC_RDAT2,
MX51_PAD_EIM_CS3__FEC_RDAT3,
MX51_PAD_EIM_CS4__FEC_RX_ER,
MX51_PAD_EIM_CS5__FEC_CRS,
MX51_PAD_NANDF_RB2__FEC_COL,
MX51_PAD_NANDF_RB3__FEC_RXCLK,
MX51_PAD_NANDF_RB6__FEC_RDAT0,
MX51_PAD_NANDF_RB7__FEC_TDAT0,
MX51_PAD_NANDF_CS2__FEC_TX_ER,
MX51_PAD_NANDF_CS3__FEC_MDC,
MX51_PAD_NANDF_CS4__FEC_TDAT1,
MX51_PAD_NANDF_CS5__FEC_TDAT2,
MX51_PAD_NANDF_CS6__FEC_TDAT3,
MX51_PAD_NANDF_CS7__FEC_TX_EN,
MX51_PAD_NANDF_RDY_INT__FEC_TX_CLK,
/* FEC PHY reset line */
MX51_PAD_EIM_A20__GPIO_2_14,
};
/* Serial ports */
#if defined(CONFIG_SERIAL_IMX) || defined(CONFIG_SERIAL_IMX_MODULE)
static const struct imxuart_platform_data uart_pdata __initconst = {
.flags = IMXUART_HAVE_RTSCTS,
};
static inline void mxc_init_imx_uart(void)
{
imx51_add_imx_uart(0, &uart_pdata);
imx51_add_imx_uart(1, &uart_pdata);
imx51_add_imx_uart(2, &uart_pdata);
}
#else /* !SERIAL_IMX */
static inline void mxc_init_imx_uart(void)
{
}
#endif /* SERIAL_IMX */
static const struct imxi2c_platform_data babbage_i2c_data __initconst = {
.bitrate = 100000,
};
static struct imxi2c_platform_data babbage_hsi2c_data = {
.bitrate = 400000,
};
static int gpio_usbh1_active(void)
{
struct pad_desc usbh1stp_gpio = MX51_PAD_USBH1_STP__GPIO_1_27;
struct pad_desc phyreset_gpio = MX51_PAD_EIM_D21__GPIO_2_5;
int ret;
/* Set USBH1_STP to GPIO and toggle it */
mxc_iomux_v3_setup_pad(&usbh1stp_gpio);
ret = gpio_request(BABBAGE_USBH1_STP, "usbh1_stp");
if (ret) {
pr_debug("failed to get MX51_PAD_USBH1_STP__GPIO_1_27: %d\n", ret);
return ret;
}
gpio_direction_output(BABBAGE_USBH1_STP, 0);
gpio_set_value(BABBAGE_USBH1_STP, 1);
msleep(100);
gpio_free(BABBAGE_USBH1_STP);
/* De-assert USB PHY RESETB */
mxc_iomux_v3_setup_pad(&phyreset_gpio);
ret = gpio_request(BABBAGE_PHY_RESET, "phy_reset");
if (ret) {
pr_debug("failed to get MX51_PAD_EIM_D21__GPIO_2_5: %d\n", ret);
return ret;
}
gpio_direction_output(BABBAGE_PHY_RESET, 1);
return 0;
}
static inline void babbage_usbhub_reset(void)
{
int ret;
/* Bring USB hub out of reset */
ret = gpio_request(BABBAGE_USB_HUB_RESET, "GPIO1_7");
if (ret) {
printk(KERN_ERR"failed to get GPIO_USB_HUB_RESET: %d\n", ret);
return;
}
gpio_direction_output(BABBAGE_USB_HUB_RESET, 0);
/* USB HUB RESET - De-assert USB HUB RESET_N */
msleep(1);
gpio_set_value(BABBAGE_USB_HUB_RESET, 0);
msleep(1);
gpio_set_value(BABBAGE_USB_HUB_RESET, 1);
}
static inline void babbage_fec_reset(void)
{
int ret;
/* reset FEC PHY */
ret = gpio_request(BABBAGE_FEC_PHY_RESET, "fec-phy-reset");
if (ret) {
printk(KERN_ERR"failed to get GPIO_FEC_PHY_RESET: %d\n", ret);
return;
}
gpio_direction_output(BABBAGE_FEC_PHY_RESET, 0);
gpio_set_value(BABBAGE_FEC_PHY_RESET, 0);
msleep(1);
gpio_set_value(BABBAGE_FEC_PHY_RESET, 1);
}
/* This function is board specific as the bit mask for the plldiv will also
be different for other Freescale SoCs, thus a common bitmask is not
possible and cannot get place in /plat-mxc/ehci.c.*/
static int initialize_otg_port(struct platform_device *pdev)
{
u32 v;
void __iomem *usb_base;
void __iomem *usbother_base;
usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
/* Set the PHY clock to 19.2MHz */
v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
v &= ~MX5_USB_UTMI_PHYCTRL1_PLLDIV_MASK;
v |= MX51_USB_PLL_DIV_19_2_MHZ;
__raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
iounmap(usb_base);
return 0;
}
static int initialize_usbh1_port(struct platform_device *pdev)
{
u32 v;
void __iomem *usb_base;
void __iomem *usbother_base;
usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
/* The clock for the USBH1 ULPI port will come externally from the PHY. */
v = __raw_readl(usbother_base + MX51_USB_CTRL_1_OFFSET);
__raw_writel(v | MX51_USB_CTRL_UH1_EXT_CLK_EN, usbother_base + MX51_USB_CTRL_1_OFFSET);
iounmap(usb_base);
return 0;
}
static struct mxc_usbh_platform_data dr_utmi_config = {
.init = initialize_otg_port,
.portsc = MXC_EHCI_UTMI_16BIT,
.flags = MXC_EHCI_INTERNAL_PHY,
};
static struct fsl_usb2_platform_data usb_pdata = {
.operating_mode = FSL_USB2_DR_DEVICE,
.phy_mode = FSL_USB2_PHY_UTMI_WIDE,
};
static struct mxc_usbh_platform_data usbh1_config = {
.init = initialize_usbh1_port,
.portsc = MXC_EHCI_MODE_ULPI,
.flags = (MXC_EHCI_POWER_PINS_ENABLED | MXC_EHCI_ITC_NO_THRESHOLD),
};
static int otg_mode_host;
static int __init babbage_otg_mode(char *options)
{
if (!strcmp(options, "host"))
otg_mode_host = 1;
else if (!strcmp(options, "device"))
otg_mode_host = 0;
else
pr_info("otg_mode neither \"host\" nor \"device\". "
"Defaulting to device\n");
return 0;
}
__setup("otg_mode=", babbage_otg_mode);
/*
* Board specific initialization.
*/
static void __init mxc_board_init(void)
{
struct pad_desc usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP;
mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads,
ARRAY_SIZE(mx51babbage_pads));
mxc_init_imx_uart();
babbage_fec_reset();
imx51_add_fec(NULL);
imx51_add_imx_i2c(0, &babbage_i2c_data);
imx51_add_imx_i2c(1, &babbage_i2c_data);
mxc_register_device(&mxc_hsi2c_device, &babbage_hsi2c_data);
if (otg_mode_host)
mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);
else {
initialize_otg_port(NULL);
mxc_register_device(&mxc_usbdr_udc_device, &usb_pdata);
}
gpio_usbh1_active();
mxc_register_device(&mxc_usbh1_device, &usbh1_config);
/* setback USBH1_STP to be function */
mxc_iomux_v3_setup_pad(&usbh1stp);
babbage_usbhub_reset();
}
static void __init mx51_babbage_timer_init(void)
{
mx51_clocks_init(32768, 24000000, 22579200, 0);
}
static struct sys_timer mxc_timer = {
.init = mx51_babbage_timer_init,
};
MACHINE_START(MX51_BABBAGE, "Freescale MX51 Babbage Board")
/* Maintainer: Amit Kucheria <amit.kucheria@canonical.com> */
.boot_params = MX51_PHYS_OFFSET + 0x100,
.map_io = mx51_map_io,
.init_irq = mx51_init_irq,
.init_machine = mxc_board_init,
.timer = &mxc_timer,
MACHINE_END
|
