2 * Copyright STMicroelectronics, 2007.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 #include <linux/types.h>
20 #include <linux/init.h>
21 #include <linux/device.h>
22 #include <linux/amba/bus.h>
23 #include <linux/platform_device.h>
25 #include <linux/slab.h>
26 #include <linux/irq.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/platform_data/clk-nomadik.h>
29 #include <linux/clocksource.h>
30 #include <linux/of_irq.h>
31 #include <linux/of_gpio.h>
32 #include <linux/of_address.h>
33 #include <linux/of_platform.h>
34 #include <linux/mtd/fsmc.h>
35 #include <linux/gpio.h>
36 #include <linux/amba/mmci.h>
38 #include <asm/mach/arch.h>
39 #include <asm/mach/map.h>
40 #include <asm/mach/time.h>
41 #include <asm/mach-types.h>
43 #include <asm/cacheflush.h>
44 #include <asm/hardware/cache-l2x0.h>
47 * These are the only hard-coded address offsets we still have to use.
49 #define NOMADIK_FSMC_BASE 0x10100000 /* FSMC registers */
50 #define NOMADIK_SDRAMC_BASE 0x10110000 /* SDRAM Controller */
51 #define NOMADIK_CLCDC_BASE 0x10120000 /* CLCD Controller */
52 #define NOMADIK_MDIF_BASE 0x10120000 /* MDIF */
53 #define NOMADIK_DMA0_BASE 0x10130000 /* DMA0 Controller */
54 #define NOMADIK_IC_BASE 0x10140000 /* Vectored Irq Controller */
55 #define NOMADIK_DMA1_BASE 0x10150000 /* DMA1 Controller */
56 #define NOMADIK_USB_BASE 0x10170000 /* USB-OTG conf reg base */
57 #define NOMADIK_CRYP_BASE 0x10180000 /* Crypto processor */
58 #define NOMADIK_SHA1_BASE 0x10190000 /* SHA-1 Processor */
59 #define NOMADIK_XTI_BASE 0x101A0000 /* XTI */
60 #define NOMADIK_RNG_BASE 0x101B0000 /* Random number generator */
61 #define NOMADIK_SRC_BASE 0x101E0000 /* SRC base */
62 #define NOMADIK_WDOG_BASE 0x101E1000 /* Watchdog */
63 #define NOMADIK_MTU0_BASE 0x101E2000 /* Multiple Timer 0 */
64 #define NOMADIK_MTU1_BASE 0x101E3000 /* Multiple Timer 1 */
65 #define NOMADIK_GPIO0_BASE 0x101E4000 /* GPIO0 */
66 #define NOMADIK_GPIO1_BASE 0x101E5000 /* GPIO1 */
67 #define NOMADIK_GPIO2_BASE 0x101E6000 /* GPIO2 */
68 #define NOMADIK_GPIO3_BASE 0x101E7000 /* GPIO3 */
69 #define NOMADIK_RTC_BASE 0x101E8000 /* Real Time Clock base */
70 #define NOMADIK_PMU_BASE 0x101E9000 /* Power Management Unit */
71 #define NOMADIK_OWM_BASE 0x101EA000 /* One wire master */
72 #define NOMADIK_SCR_BASE 0x101EF000 /* Secure Control registers */
73 #define NOMADIK_MSP2_BASE 0x101F0000 /* MSP 2 interface */
74 #define NOMADIK_MSP1_BASE 0x101F1000 /* MSP 1 interface */
75 #define NOMADIK_UART2_BASE 0x101F2000 /* UART 2 interface */
76 #define NOMADIK_SSIRx_BASE 0x101F3000 /* SSI 8-ch rx interface */
77 #define NOMADIK_SSITx_BASE 0x101F4000 /* SSI 8-ch tx interface */
78 #define NOMADIK_MSHC_BASE 0x101F5000 /* Memory Stick(Pro) Host */
79 #define NOMADIK_SDI_BASE 0x101F6000 /* SD-card/MM-Card */
80 #define NOMADIK_I2C1_BASE 0x101F7000 /* I2C1 interface */
81 #define NOMADIK_I2C0_BASE 0x101F8000 /* I2C0 interface */
82 #define NOMADIK_MSP0_BASE 0x101F9000 /* MSP 0 interface */
83 #define NOMADIK_FIRDA_BASE 0x101FA000 /* FIrDA interface */
84 #define NOMADIK_UART1_BASE 0x101FB000 /* UART 1 interface */
85 #define NOMADIK_SSP_BASE 0x101FC000 /* SSP interface */
86 #define NOMADIK_UART0_BASE 0x101FD000 /* UART 0 interface */
87 #define NOMADIK_SGA_BASE 0x101FE000 /* SGA interface */
88 #define NOMADIK_L2CC_BASE 0x10210000 /* L2 Cache controller */
89 #define NOMADIK_UART1_VBASE 0xF01FB000
91 /* This is needed for LL-debug/earlyprintk/debug-macro.S */
92 static struct map_desc cpu8815_io_desc
[] __initdata
= {
94 .virtual = NOMADIK_UART1_VBASE
,
95 .pfn
= __phys_to_pfn(NOMADIK_UART1_BASE
),
101 static void __init
cpu8815_map_io(void)
103 iotable_init(cpu8815_io_desc
, ARRAY_SIZE(cpu8815_io_desc
));
106 static void cpu8815_restart(enum reboot_mode mode
, const char *cmd
)
108 void __iomem
*srcbase
= ioremap(NOMADIK_SRC_BASE
, SZ_4K
);
110 /* FIXME: use egpio when implemented */
112 /* Write anything to Reset status register */
113 writel(1, srcbase
+ 0x18);
116 /* Initial value for SRC control register: all timers use MXTAL/8 source */
117 #define SRC_CR_INIT_MASK 0x00007fff
118 #define SRC_CR_INIT_VAL 0x2aaa8000
120 static void __init
cpu8815_timer_init_of(void)
122 struct device_node
*mtu
;
127 /* We need this to be up now */
130 mtu
= of_find_node_by_path("/mtu@101e2000");
133 base
= of_iomap(mtu
, 0);
136 irq
= irq_of_parse_and_map(mtu
, 0);
138 pr_info("Remapped MTU @ %p, irq: %d\n", base
, irq
);
140 /* Configure timer sources in "system reset controller" ctrl reg */
141 src_cr
= readl(base
);
142 src_cr
&= SRC_CR_INIT_MASK
;
143 src_cr
|= SRC_CR_INIT_VAL
;
144 writel(src_cr
, base
);
146 clocksource_of_init();
149 static struct fsmc_nand_timings cpu8815_nand_timings
= {
156 static struct fsmc_nand_platform_data cpu8815_nand_data
= {
157 .nand_timings
= &cpu8815_nand_timings
,
161 * The SMSC911x IRQ is connected to a GPIO pin, but the driver expects
162 * to simply request an IRQ passed as a resource. So the GPIO pin needs
163 * to be requested by this hog and set as input.
165 static int __init
cpu8815_eth_init(void)
167 struct device_node
*eth
;
170 eth
= of_find_node_by_path("/usb-s8815/ethernet-gpio");
172 pr_info("could not find any ethernet GPIO\n");
175 gpio
= of_get_gpio(eth
, 0);
176 err
= gpio_request(gpio
, "eth_irq");
178 pr_info("failed to request ethernet GPIO\n");
181 err
= gpio_direction_input(gpio
);
183 pr_info("failed to set ethernet GPIO as input\n");
186 irq
= gpio_to_irq(gpio
);
187 pr_info("enabled USB-S8815 ethernet GPIO %d, IRQ %d\n", gpio
, irq
);
190 device_initcall(cpu8815_eth_init
);
194 * cannot be set from device tree, convert to a proper DT
197 static struct mmci_platform_data mmcsd_plat_data
= {
198 .ocr_mask
= MMC_VDD_29_30
,
202 * This GPIO pin turns on a line that is used to detect card insertion
205 static int __init
cpu8815_mmcsd_init(void)
207 struct device_node
*cdbias
;
210 cdbias
= of_find_node_by_path("/usb-s8815/mmcsd-gpio");
212 pr_info("could not find MMC/SD card detect bias node\n");
215 gpio
= of_get_gpio(cdbias
, 0);
217 pr_info("could not obtain MMC/SD card detect bias GPIO\n");
220 err
= gpio_request(gpio
, "card detect bias");
222 pr_info("failed to request card detect bias GPIO %d\n", gpio
);
225 err
= gpio_direction_output(gpio
, 0);
227 pr_info("failed to set GPIO %d as output, low\n", gpio
);
230 pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio
);
233 device_initcall(cpu8815_mmcsd_init
);
236 /* These are mostly to get the right device names for the clock lookups */
237 static struct of_dev_auxdata cpu8815_auxdata_lookup
[] __initdata
= {
238 OF_DEV_AUXDATA("stericsson,fsmc-nand", NOMADIK_FSMC_BASE
,
239 NULL
, &cpu8815_nand_data
),
240 OF_DEV_AUXDATA("arm,primecell", NOMADIK_SDI_BASE
,
241 NULL
, &mmcsd_plat_data
),
245 static void __init
cpu8815_init_of(void)
247 #ifdef CONFIG_CACHE_L2X0
248 /* At full speed latency must be >=2, so 0x249 in low bits */
249 l2x0_of_init(0x00730249, 0xfe000fff);
251 of_platform_populate(NULL
, of_default_bus_match_table
,
252 cpu8815_auxdata_lookup
, NULL
);
255 static const char * cpu8815_board_compat
[] = {
256 "calaosystems,usb-s8815",
260 DT_MACHINE_START(NOMADIK_DT
, "Nomadik STn8815")
261 .map_io
= cpu8815_map_io
,
262 .init_time
= cpu8815_timer_init_of
,
263 .init_machine
= cpu8815_init_of
,
264 .restart
= cpu8815_restart
,
265 .dt_compat
= cpu8815_board_compat
,