Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/arch/arm/mach-pxa/gumstix.c
4 *
5 * Support for the Gumstix motherboards.
6 *
7 * Original Author: Craig Hughes
8 * Created: Feb 14, 2008
9 * Copyright: Craig Hughes
10 *
11 * Implemented based on lubbock.c by Nicolas Pitre and code from Craig
12 * Hughes
13 */
14
15#include <linux/module.h>
16#include <linux/kernel.h>
17#include <linux/init.h>
18#include <linux/platform_device.h>
19#include <linux/interrupt.h>
20#include <linux/delay.h>
21#include <linux/mtd/mtd.h>
22#include <linux/mtd/partitions.h>
23#include <linux/gpio/machine.h>
24#include <linux/gpio/property.h>
25#include <linux/gpio.h>
26#include <linux/err.h>
27#include <linux/clk.h>
28
29#include <asm/setup.h>
30#include <asm/page.h>
31#include <asm/mach-types.h>
32#include <asm/irq.h>
33#include <linux/sizes.h>
34
35#include <asm/mach/arch.h>
36#include <asm/mach/map.h>
37#include <asm/mach/irq.h>
38#include <asm/mach/flash.h>
39
40#include "pxa25x.h"
41#include <linux/platform_data/mmc-pxamci.h>
42#include "udc.h"
43#include "gumstix.h"
44#include "devices.h"
45
46#include "generic.h"
47
48static struct resource flash_resource = {
49 .start = 0x00000000,
50 .end = SZ_64M - 1,
51 .flags = IORESOURCE_MEM,
52};
53
54static struct mtd_partition gumstix_partitions[] = {
55 {
56 .name = "Bootloader",
57 .size = 0x00040000,
58 .offset = 0,
59 .mask_flags = MTD_WRITEABLE /* force read-only */
60 } , {
61 .name = "rootfs",
62 .size = MTDPART_SIZ_FULL,
63 .offset = MTDPART_OFS_APPEND
64 }
65};
66
67static struct flash_platform_data gumstix_flash_data = {
68 .map_name = "cfi_probe",
69 .parts = gumstix_partitions,
70 .nr_parts = ARRAY_SIZE(gumstix_partitions),
71 .width = 2,
72};
73
74static struct platform_device gumstix_flash_device = {
75 .name = "pxa2xx-flash",
76 .id = 0,
77 .dev = {
78 .platform_data = &gumstix_flash_data,
79 },
80 .resource = &flash_resource,
81 .num_resources = 1,
82};
83
84static struct platform_device *devices[] __initdata = {
85 &gumstix_flash_device,
86};
87
88#ifdef CONFIG_MMC_PXA
89static struct pxamci_platform_data gumstix_mci_platform_data = {
90 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
91};
92
93static void __init gumstix_mmc_init(void)
94{
95 pxa_set_mci_info(&gumstix_mci_platform_data, NULL);
96}
97#else
98static void __init gumstix_mmc_init(void)
99{
100 pr_debug("Gumstix mmc disabled\n");
101}
102#endif
103
104#if IS_ENABLED(CONFIG_USB_PXA25X)
105static const struct property_entry gumstix_vbus_props[] __initconst = {
106 PROPERTY_ENTRY_GPIO("vbus-gpios", &pxa2xx_gpiochip_node,
107 GPIO_GUMSTIX_USB_GPIOn, GPIO_ACTIVE_HIGH),
108 PROPERTY_ENTRY_GPIO("pullup-gpios", &pxa2xx_gpiochip_node,
109 GPIO_GUMSTIX_USB_GPIOx, GPIO_ACTIVE_HIGH),
110 { }
111};
112
113static const struct platform_device_info gumstix_gpio_vbus_info __initconst = {
114 .name = "gpio-vbus",
115 .id = PLATFORM_DEVID_NONE,
116 .properties = gumstix_vbus_props,
117};
118
119static void __init gumstix_udc_init(void)
120{
121 platform_device_register_full(&gumstix_gpio_vbus_info);
122}
123#else
124static void gumstix_udc_init(void)
125{
126 pr_debug("Gumstix udc is disabled\n");
127}
128#endif
129
130#ifdef CONFIG_BT
131/* Normally, the bootloader would have enabled this 32kHz clock but many
132** boards still have u-boot 1.1.4 so we check if it has been turned on and
133** if not, we turn it on with a warning message. */
134static void gumstix_setup_bt_clock(void)
135{
136 int timeout = 500;
137
138 if (!(readl(OSCC) & OSCC_OOK))
139 pr_warn("32kHz clock was not on. Bootloader may need to be updated\n");
140 else
141 return;
142
143 writel(readl(OSCC) | OSCC_OON, OSCC);
144 do {
145 if (readl(OSCC) & OSCC_OOK)
146 break;
147 udelay(1);
148 } while (--timeout);
149 if (!timeout)
150 pr_err("Failed to start 32kHz clock\n");
151}
152
153static void __init gumstix_bluetooth_init(void)
154{
155 int err;
156
157 gumstix_setup_bt_clock();
158
159 err = gpio_request(GPIO_GUMSTIX_BTRESET, "BTRST");
160 if (err) {
161 pr_err("gumstix: failed request gpio for bluetooth reset\n");
162 return;
163 }
164
165 err = gpio_direction_output(GPIO_GUMSTIX_BTRESET, 1);
166 if (err) {
167 pr_err("gumstix: can't reset bluetooth\n");
168 return;
169 }
170 gpio_set_value(GPIO_GUMSTIX_BTRESET, 0);
171 udelay(100);
172 gpio_set_value(GPIO_GUMSTIX_BTRESET, 1);
173}
174#else
175static void gumstix_bluetooth_init(void)
176{
177 pr_debug("Gumstix Bluetooth is disabled\n");
178}
179#endif
180
181static unsigned long gumstix_pin_config[] __initdata = {
182 GPIO12_32KHz,
183 /* BTUART */
184 GPIO42_HWUART_RXD,
185 GPIO43_HWUART_TXD,
186 GPIO44_HWUART_CTS,
187 GPIO45_HWUART_RTS,
188 /* MMC */
189 GPIO6_MMC_CLK,
190 GPIO53_MMC_CLK,
191 GPIO8_MMC_CS0,
192};
193
194int __attribute__((weak)) am200_init(void)
195{
196 return 0;
197}
198
199int __attribute__((weak)) am300_init(void)
200{
201 return 0;
202}
203
204static void __init carrier_board_init(void)
205{
206 /*
207 * put carrier/expansion board init here if
208 * they cannot be detected programatically
209 */
210 am200_init();
211 am300_init();
212}
213
214static void __init gumstix_init(void)
215{
216 pxa2xx_mfp_config(ARRAY_AND_SIZE(gumstix_pin_config));
217
218 pxa_set_ffuart_info(NULL);
219 pxa_set_btuart_info(NULL);
220 pxa_set_stuart_info(NULL);
221 pxa_set_hwuart_info(NULL);
222
223 gumstix_bluetooth_init();
224 gumstix_udc_init();
225 gumstix_mmc_init();
226 (void) platform_add_devices(devices, ARRAY_SIZE(devices));
227 carrier_board_init();
228}
229
230MACHINE_START(GUMSTIX, "Gumstix")
231 .atag_offset = 0x100, /* match u-boot bi_boot_params */
232 .map_io = pxa25x_map_io,
233 .nr_irqs = PXA_NR_IRQS,
234 .init_irq = pxa25x_init_irq,
235 .init_time = pxa_timer_init,
236 .init_machine = gumstix_init,
237 .restart = pxa_restart,
238MACHINE_END
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/arch/arm/mach-pxa/gumstix.c
4 *
5 * Support for the Gumstix motherboards.
6 *
7 * Original Author: Craig Hughes
8 * Created: Feb 14, 2008
9 * Copyright: Craig Hughes
10 *
11 * Implemented based on lubbock.c by Nicolas Pitre and code from Craig
12 * Hughes
13 */
14
15#include <linux/module.h>
16#include <linux/kernel.h>
17#include <linux/init.h>
18#include <linux/platform_device.h>
19#include <linux/interrupt.h>
20#include <linux/delay.h>
21#include <linux/mtd/mtd.h>
22#include <linux/mtd/partitions.h>
23#include <linux/gpio/machine.h>
24#include <linux/gpio.h>
25#include <linux/err.h>
26#include <linux/clk.h>
27
28#include <asm/setup.h>
29#include <asm/page.h>
30#include <asm/mach-types.h>
31#include <asm/irq.h>
32#include <linux/sizes.h>
33
34#include <asm/mach/arch.h>
35#include <asm/mach/map.h>
36#include <asm/mach/irq.h>
37#include <asm/mach/flash.h>
38
39#include "pxa25x.h"
40#include <linux/platform_data/mmc-pxamci.h>
41#include "udc.h"
42#include "gumstix.h"
43
44#include "generic.h"
45
46static struct resource flash_resource = {
47 .start = 0x00000000,
48 .end = SZ_64M - 1,
49 .flags = IORESOURCE_MEM,
50};
51
52static struct mtd_partition gumstix_partitions[] = {
53 {
54 .name = "Bootloader",
55 .size = 0x00040000,
56 .offset = 0,
57 .mask_flags = MTD_WRITEABLE /* force read-only */
58 } , {
59 .name = "rootfs",
60 .size = MTDPART_SIZ_FULL,
61 .offset = MTDPART_OFS_APPEND
62 }
63};
64
65static struct flash_platform_data gumstix_flash_data = {
66 .map_name = "cfi_probe",
67 .parts = gumstix_partitions,
68 .nr_parts = ARRAY_SIZE(gumstix_partitions),
69 .width = 2,
70};
71
72static struct platform_device gumstix_flash_device = {
73 .name = "pxa2xx-flash",
74 .id = 0,
75 .dev = {
76 .platform_data = &gumstix_flash_data,
77 },
78 .resource = &flash_resource,
79 .num_resources = 1,
80};
81
82static struct platform_device *devices[] __initdata = {
83 &gumstix_flash_device,
84};
85
86#ifdef CONFIG_MMC_PXA
87static struct pxamci_platform_data gumstix_mci_platform_data = {
88 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
89};
90
91static void __init gumstix_mmc_init(void)
92{
93 pxa_set_mci_info(&gumstix_mci_platform_data);
94}
95#else
96static void __init gumstix_mmc_init(void)
97{
98 pr_debug("Gumstix mmc disabled\n");
99}
100#endif
101
102#ifdef CONFIG_USB_PXA25X
103static struct gpiod_lookup_table gumstix_gpio_vbus_gpiod_table = {
104 .dev_id = "gpio-vbus",
105 .table = {
106 GPIO_LOOKUP("gpio-pxa", GPIO_GUMSTIX_USB_GPIOn,
107 "vbus", GPIO_ACTIVE_HIGH),
108 GPIO_LOOKUP("gpio-pxa", GPIO_GUMSTIX_USB_GPIOx,
109 "pullup", GPIO_ACTIVE_HIGH),
110 { },
111 },
112};
113
114static struct platform_device gumstix_gpio_vbus = {
115 .name = "gpio-vbus",
116 .id = -1,
117};
118
119static void __init gumstix_udc_init(void)
120{
121 gpiod_add_lookup_table(&gumstix_gpio_vbus_gpiod_table);
122 platform_device_register(&gumstix_gpio_vbus);
123}
124#else
125static void gumstix_udc_init(void)
126{
127 pr_debug("Gumstix udc is disabled\n");
128}
129#endif
130
131#ifdef CONFIG_BT
132/* Normally, the bootloader would have enabled this 32kHz clock but many
133** boards still have u-boot 1.1.4 so we check if it has been turned on and
134** if not, we turn it on with a warning message. */
135static void gumstix_setup_bt_clock(void)
136{
137 int timeout = 500;
138
139 if (!(readl(OSCC) & OSCC_OOK))
140 pr_warn("32kHz clock was not on. Bootloader may need to be updated\n");
141 else
142 return;
143
144 writel(readl(OSCC) | OSCC_OON, OSCC);
145 do {
146 if (readl(OSCC) & OSCC_OOK)
147 break;
148 udelay(1);
149 } while (--timeout);
150 if (!timeout)
151 pr_err("Failed to start 32kHz clock\n");
152}
153
154static void __init gumstix_bluetooth_init(void)
155{
156 int err;
157
158 gumstix_setup_bt_clock();
159
160 err = gpio_request(GPIO_GUMSTIX_BTRESET, "BTRST");
161 if (err) {
162 pr_err("gumstix: failed request gpio for bluetooth reset\n");
163 return;
164 }
165
166 err = gpio_direction_output(GPIO_GUMSTIX_BTRESET, 1);
167 if (err) {
168 pr_err("gumstix: can't reset bluetooth\n");
169 return;
170 }
171 gpio_set_value(GPIO_GUMSTIX_BTRESET, 0);
172 udelay(100);
173 gpio_set_value(GPIO_GUMSTIX_BTRESET, 1);
174}
175#else
176static void gumstix_bluetooth_init(void)
177{
178 pr_debug("Gumstix Bluetooth is disabled\n");
179}
180#endif
181
182static unsigned long gumstix_pin_config[] __initdata = {
183 GPIO12_32KHz,
184 /* BTUART */
185 GPIO42_HWUART_RXD,
186 GPIO43_HWUART_TXD,
187 GPIO44_HWUART_CTS,
188 GPIO45_HWUART_RTS,
189 /* MMC */
190 GPIO6_MMC_CLK,
191 GPIO53_MMC_CLK,
192 GPIO8_MMC_CS0,
193};
194
195int __attribute__((weak)) am200_init(void)
196{
197 return 0;
198}
199
200int __attribute__((weak)) am300_init(void)
201{
202 return 0;
203}
204
205static void __init carrier_board_init(void)
206{
207 /*
208 * put carrier/expansion board init here if
209 * they cannot be detected programatically
210 */
211 am200_init();
212 am300_init();
213}
214
215static void __init gumstix_init(void)
216{
217 pxa2xx_mfp_config(ARRAY_AND_SIZE(gumstix_pin_config));
218
219 pxa_set_ffuart_info(NULL);
220 pxa_set_btuart_info(NULL);
221 pxa_set_stuart_info(NULL);
222 pxa_set_hwuart_info(NULL);
223
224 gumstix_bluetooth_init();
225 gumstix_udc_init();
226 gumstix_mmc_init();
227 (void) platform_add_devices(devices, ARRAY_SIZE(devices));
228 carrier_board_init();
229}
230
231MACHINE_START(GUMSTIX, "Gumstix")
232 .atag_offset = 0x100, /* match u-boot bi_boot_params */
233 .map_io = pxa25x_map_io,
234 .nr_irqs = PXA_NR_IRQS,
235 .init_irq = pxa25x_init_irq,
236 .init_time = pxa_timer_init,
237 .init_machine = gumstix_init,
238 .restart = pxa_restart,
239MACHINE_END