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Linux/arch/arm/mach-imx/mach-kzm_arm11_01.c

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  1 /*
  2  * KZM-ARM11-01 support
  3  *  Copyright (C) 2009  Yoichi Yuasa <yuasa@linux-mips.org>
  4  *
  5  * based on code for MX31ADS,
  6  *  Copyright (C) 2000 Deep Blue Solutions Ltd
  7  *  Copyright (C) 2002 Shane Nay (shane@minirl.com)
  8  *  Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
  9  *
 10  * This program is free software; you can redistribute it and/or modify
 11  * it under the terms of the GNU General Public License as published by
 12  * the Free Software Foundation; either version 2 of the License, or
 13  * (at your option) any later version.
 14  *
 15  * This program is distributed in the hope that it will be useful,
 16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 18  * GNU General Public License for more details.
 19  */
 20 
 21 #include <linux/gpio.h>
 22 #include <linux/init.h>
 23 #include <linux/platform_device.h>
 24 #include <linux/serial_8250.h>
 25 #include <linux/smsc911x.h>
 26 #include <linux/types.h>
 27 #include <linux/regulator/machine.h>
 28 #include <linux/regulator/fixed.h>
 29 
 30 #include <asm/irq.h>
 31 #include <asm/mach-types.h>
 32 #include <asm/memory.h>
 33 #include <asm/setup.h>
 34 #include <asm/mach/arch.h>
 35 #include <asm/mach/irq.h>
 36 #include <asm/mach/map.h>
 37 #include <asm/mach/time.h>
 38 
 39 #include "common.h"
 40 #include "devices-imx31.h"
 41 #include "hardware.h"
 42 #include "iomux-mx3.h"
 43 
 44 #define KZM_ARM11_IO_ADDRESS(x) (IOMEM(                                 \
 45         IMX_IO_P2V_MODULE(x, MX31_CS4) ?:                               \
 46         IMX_IO_P2V_MODULE(x, MX31_CS5)) ?:                              \
 47         MX31_IO_ADDRESS(x))
 48 
 49 /*
 50  *  KZM-ARM11-01 Board Control Registers on FPGA
 51  */
 52 #define KZM_ARM11_CTL1          (MX31_CS4_BASE_ADDR + 0x1000)
 53 #define KZM_ARM11_CTL2          (MX31_CS4_BASE_ADDR + 0x1001)
 54 #define KZM_ARM11_RSW1          (MX31_CS4_BASE_ADDR + 0x1002)
 55 #define KZM_ARM11_BACK_LIGHT    (MX31_CS4_BASE_ADDR + 0x1004)
 56 #define KZM_ARM11_FPGA_REV      (MX31_CS4_BASE_ADDR + 0x1008)
 57 #define KZM_ARM11_7SEG_LED      (MX31_CS4_BASE_ADDR + 0x1010)
 58 #define KZM_ARM11_LEDS          (MX31_CS4_BASE_ADDR + 0x1020)
 59 #define KZM_ARM11_DIPSW2        (MX31_CS4_BASE_ADDR + 0x1003)
 60 
 61 /*
 62  * External UART for touch panel on FPGA
 63  */
 64 #define KZM_ARM11_16550         (MX31_CS4_BASE_ADDR + 0x1050)
 65 
 66 #if IS_ENABLED(CONFIG_SERIAL_8250)
 67 /*
 68  * KZM-ARM11-01 has an external UART on FPGA
 69  */
 70 static struct plat_serial8250_port serial_platform_data[] = {
 71         {
 72                 .membase        = KZM_ARM11_IO_ADDRESS(KZM_ARM11_16550),
 73                 .mapbase        = KZM_ARM11_16550,
 74                 /* irq number is run-time assigned */
 75                 .irqflags       = IRQ_TYPE_EDGE_RISING,
 76                 .uartclk        = 14745600,
 77                 .regshift       = 0,
 78                 .iotype         = UPIO_MEM,
 79                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
 80                                   UPF_BUGGY_UART,
 81         },
 82         {},
 83 };
 84 
 85 static struct resource serial8250_resources[] = {
 86         {
 87                 .start  = KZM_ARM11_16550,
 88                 .end    = KZM_ARM11_16550 + 0x10,
 89                 .flags  = IORESOURCE_MEM,
 90         },
 91         {
 92                 /* irq number is run-time assigned */
 93                 .flags  = IORESOURCE_IRQ,
 94         },
 95 };
 96 
 97 static struct platform_device serial_device = {
 98         .name           = "serial8250",
 99         .id             = PLAT8250_DEV_PLATFORM,
100         .dev            = {
101                                 .platform_data = serial_platform_data,
102                           },
103         .num_resources  = ARRAY_SIZE(serial8250_resources),
104         .resource       = serial8250_resources,
105 };
106 
107 static int __init kzm_init_ext_uart(void)
108 {
109         u8 tmp;
110 
111         /*
112          * GPIO 1-1: external UART interrupt line
113          */
114         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_GPIO1_1, IOMUX_CONFIG_GPIO));
115         gpio_request(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1), "ext-uart-int");
116         gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));
117 
118         /*
119          * Unmask UART interrupt
120          */
121         tmp = __raw_readb(KZM_ARM11_IO_ADDRESS(KZM_ARM11_CTL1));
122         tmp |= 0x2;
123         __raw_writeb(tmp, KZM_ARM11_IO_ADDRESS(KZM_ARM11_CTL1));
124 
125         serial_platform_data[0].irq =
126                         gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));
127         serial8250_resources[1].start =
128                         gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));
129         serial8250_resources[1].end =
130                         gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));
131 
132         return platform_device_register(&serial_device);
133 }
134 #else
135 static inline int kzm_init_ext_uart(void)
136 {
137         return 0;
138 }
139 #endif
140 
141 /*
142  * SMSC LAN9118
143  */
144 #if IS_ENABLED(CONFIG_SMSC911X)
145 static struct smsc911x_platform_config kzm_smsc9118_config = {
146         .phy_interface  = PHY_INTERFACE_MODE_MII,
147         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
148         .irq_type       = SMSC911X_IRQ_TYPE_PUSH_PULL,
149         .flags          = SMSC911X_USE_32BIT | SMSC911X_SAVE_MAC_ADDRESS,
150 };
151 
152 static struct resource kzm_smsc9118_resources[] = {
153         {
154                 .start  = MX31_CS5_BASE_ADDR,
155                 .end    = MX31_CS5_BASE_ADDR + SZ_128K - 1,
156                 .flags  = IORESOURCE_MEM,
157         },
158         {
159                 /* irq number is run-time assigned */
160                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
161         },
162 };
163 
164 static struct platform_device kzm_smsc9118_device = {
165         .name           = "smsc911x",
166         .id             = -1,
167         .num_resources  = ARRAY_SIZE(kzm_smsc9118_resources),
168         .resource       = kzm_smsc9118_resources,
169         .dev            = {
170                                 .platform_data = &kzm_smsc9118_config,
171                           },
172 };
173 
174 static struct regulator_consumer_supply dummy_supplies[] = {
175         REGULATOR_SUPPLY("vdd33a", "smsc911x"),
176         REGULATOR_SUPPLY("vddvario", "smsc911x"),
177 };
178 
179 static int __init kzm_init_smsc9118(void)
180 {
181         /*
182          * GPIO 1-2: SMSC9118 interrupt line
183          */
184         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_GPIO1_2, IOMUX_CONFIG_GPIO));
185         gpio_request(IOMUX_TO_GPIO(MX31_PIN_GPIO1_2), "smsc9118-int");
186         gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_GPIO1_2));
187 
188         regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));
189 
190         kzm_smsc9118_resources[1].start =
191                         gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_2));
192         kzm_smsc9118_resources[1].end =
193                         gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_2));
194 
195         return platform_device_register(&kzm_smsc9118_device);
196 }
197 #else
198 static inline int kzm_init_smsc9118(void)
199 {
200         return 0;
201 }
202 #endif
203 
204 #if IS_ENABLED(CONFIG_SERIAL_IMX)
205 static const struct imxuart_platform_data uart_pdata __initconst = {
206         .flags = IMXUART_HAVE_RTSCTS,
207 };
208 
209 static void __init kzm_init_imx_uart(void)
210 {
211         imx31_add_imx_uart0(&uart_pdata);
212         imx31_add_imx_uart1(&uart_pdata);
213 }
214 #else
215 static inline void kzm_init_imx_uart(void)
216 {
217 }
218 #endif
219 
220 static int kzm_pins[] __initdata = {
221         MX31_PIN_CTS1__CTS1,
222         MX31_PIN_RTS1__RTS1,
223         MX31_PIN_TXD1__TXD1,
224         MX31_PIN_RXD1__RXD1,
225         MX31_PIN_DCD_DCE1__DCD_DCE1,
226         MX31_PIN_RI_DCE1__RI_DCE1,
227         MX31_PIN_DSR_DCE1__DSR_DCE1,
228         MX31_PIN_DTR_DCE1__DTR_DCE1,
229         MX31_PIN_CTS2__CTS2,
230         MX31_PIN_RTS2__RTS2,
231         MX31_PIN_TXD2__TXD2,
232         MX31_PIN_RXD2__RXD2,
233         MX31_PIN_DCD_DTE1__DCD_DTE2,
234         MX31_PIN_RI_DTE1__RI_DTE2,
235         MX31_PIN_DSR_DTE1__DSR_DTE2,
236         MX31_PIN_DTR_DTE1__DTR_DTE2,
237 };
238 
239 /*
240  * Board specific initialization.
241  */
242 static void __init kzm_board_init(void)
243 {
244         imx31_soc_init();
245 
246         mxc_iomux_setup_multiple_pins(kzm_pins,
247                                       ARRAY_SIZE(kzm_pins), "kzm");
248         kzm_init_imx_uart();
249 
250         pr_info("Clock input source is 26MHz\n");
251 }
252 
253 static void __init kzm_late_init(void)
254 {
255         kzm_init_ext_uart();
256         kzm_init_smsc9118();
257 }
258 
259 /*
260  * This structure defines static mappings for the kzm-arm11-01 board.
261  */
262 static struct map_desc kzm_io_desc[] __initdata = {
263         {
264                 .virtual        = (unsigned long)MX31_CS4_BASE_ADDR_VIRT,
265                 .pfn            = __phys_to_pfn(MX31_CS4_BASE_ADDR),
266                 .length         = MX31_CS4_SIZE,
267                 .type           = MT_DEVICE
268         },
269         {
270                 .virtual        = (unsigned long)MX31_CS5_BASE_ADDR_VIRT,
271                 .pfn            = __phys_to_pfn(MX31_CS5_BASE_ADDR),
272                 .length         = MX31_CS5_SIZE,
273                 .type           = MT_DEVICE
274         },
275 };
276 
277 /*
278  * Set up static virtual mappings.
279  */
280 static void __init kzm_map_io(void)
281 {
282         mx31_map_io();
283         iotable_init(kzm_io_desc, ARRAY_SIZE(kzm_io_desc));
284 }
285 
286 static void __init kzm_timer_init(void)
287 {
288         mx31_clocks_init(26000000);
289 }
290 
291 MACHINE_START(KZM_ARM11_01, "Kyoto Microcomputer Co., Ltd. KZM-ARM11-01")
292         .atag_offset = 0x100,
293         .map_io = kzm_map_io,
294         .init_early = imx31_init_early,
295         .init_irq = mx31_init_irq,
296         .init_time      = kzm_timer_init,
297         .init_machine = kzm_board_init,
298         .init_late      = kzm_late_init,
299         .restart        = mxc_restart,
300 MACHINE_END
301 

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