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1553a1ec FE |
1 | /* |
2 | * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved. | |
3 | * | |
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. | |
8 | * | |
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. | |
13 | * | |
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 | |
17 | */ | |
18 | ||
19 | #include <linux/types.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/clk.h> | |
22 | #include <linux/irq.h> | |
135cad36 | 23 | #include <linux/gpio.h> |
2b0c3677 ML |
24 | #include <linux/smsc911x.h> |
25 | #include <linux/platform_device.h> | |
1553a1ec FE |
26 | |
27 | #include <mach/hardware.h> | |
28 | #include <asm/mach-types.h> | |
29 | #include <asm/mach/arch.h> | |
30 | #include <asm/mach/time.h> | |
31 | #include <asm/memory.h> | |
32 | #include <asm/mach/map.h> | |
33 | #include <mach/common.h> | |
11a332ad | 34 | #include <mach/board-mx31_3ds.h> |
1553a1ec FE |
35 | #include <mach/imx-uart.h> |
36 | #include <mach/iomux-mx3.h> | |
37 | #include "devices.h" | |
38 | ||
39 | /*! | |
11a332ad | 40 | * @file mx31_3ds.c |
1553a1ec FE |
41 | * |
42 | * @brief This file contains the board-specific initialization routines. | |
43 | * | |
44 | * @ingroup System | |
45 | */ | |
46 | ||
11a332ad | 47 | static int mx31_3ds_pins[] = { |
153fa1d8 | 48 | /* UART1 */ |
63d97667 VL |
49 | MX31_PIN_CTS1__CTS1, |
50 | MX31_PIN_RTS1__RTS1, | |
51 | MX31_PIN_TXD1__TXD1, | |
135cad36 ML |
52 | MX31_PIN_RXD1__RXD1, |
53 | IOMUX_MODE(MX31_PIN_GPIO1_1, IOMUX_CONFIG_GPIO), | |
63d97667 VL |
54 | }; |
55 | ||
153fa1d8 ML |
56 | static struct imxuart_platform_data uart_pdata = { |
57 | .flags = IMXUART_HAVE_RTSCTS, | |
58 | }; | |
1553a1ec | 59 | |
2b0c3677 ML |
60 | /* |
61 | * Support for the SMSC9217 on the Debug board. | |
62 | */ | |
63 | ||
64 | static struct smsc911x_platform_config smsc911x_config = { | |
65 | .irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW, | |
66 | .irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL, | |
67 | .flags = SMSC911X_USE_16BIT | SMSC911X_FORCE_INTERNAL_PHY, | |
68 | .phy_interface = PHY_INTERFACE_MODE_MII, | |
69 | }; | |
70 | ||
71 | static struct resource smsc911x_resources[] = { | |
72 | { | |
73 | .start = LAN9217_BASE_ADDR, | |
74 | .end = LAN9217_BASE_ADDR + 0xff, | |
75 | .flags = IORESOURCE_MEM, | |
76 | }, { | |
77 | .start = EXPIO_INT_ENET, | |
78 | .end = EXPIO_INT_ENET, | |
79 | .flags = IORESOURCE_IRQ, | |
80 | }, | |
81 | }; | |
82 | ||
83 | static struct platform_device smsc911x_device = { | |
84 | .name = "smsc911x", | |
85 | .id = -1, | |
86 | .num_resources = ARRAY_SIZE(smsc911x_resources), | |
87 | .resource = smsc911x_resources, | |
88 | .dev = { | |
89 | .platform_data = &smsc911x_config, | |
90 | }, | |
91 | }; | |
92 | ||
135cad36 ML |
93 | /* |
94 | * Routines for the CPLD on the debug board. It contains a CPLD handling | |
95 | * LEDs, switches, interrupts for Ethernet. | |
96 | */ | |
97 | ||
11a332ad | 98 | static void mx31_3ds_expio_irq_handler(uint32_t irq, struct irq_desc *desc) |
135cad36 ML |
99 | { |
100 | uint32_t imr_val; | |
101 | uint32_t int_valid; | |
102 | uint32_t expio_irq; | |
103 | ||
104 | imr_val = __raw_readw(CPLD_INT_MASK_REG); | |
105 | int_valid = __raw_readw(CPLD_INT_STATUS_REG) & ~imr_val; | |
106 | ||
107 | expio_irq = MXC_EXP_IO_BASE; | |
108 | for (; int_valid != 0; int_valid >>= 1, expio_irq++) { | |
109 | if ((int_valid & 1) == 0) | |
110 | continue; | |
111 | generic_handle_irq(expio_irq); | |
112 | } | |
113 | } | |
114 | ||
115 | /* | |
116 | * Disable an expio pin's interrupt by setting the bit in the imr. | |
117 | * @param irq an expio virtual irq number | |
118 | */ | |
119 | static void expio_mask_irq(uint32_t irq) | |
120 | { | |
121 | uint16_t reg; | |
122 | uint32_t expio = MXC_IRQ_TO_EXPIO(irq); | |
123 | ||
124 | /* mask the interrupt */ | |
125 | reg = __raw_readw(CPLD_INT_MASK_REG); | |
126 | reg |= 1 << expio; | |
127 | __raw_writew(reg, CPLD_INT_MASK_REG); | |
128 | } | |
129 | ||
130 | /* | |
131 | * Acknowledge an expanded io pin's interrupt by clearing the bit in the isr. | |
132 | * @param irq an expanded io virtual irq number | |
133 | */ | |
134 | static void expio_ack_irq(uint32_t irq) | |
135 | { | |
136 | uint32_t expio = MXC_IRQ_TO_EXPIO(irq); | |
137 | ||
138 | /* clear the interrupt status */ | |
139 | __raw_writew(1 << expio, CPLD_INT_RESET_REG); | |
140 | __raw_writew(0, CPLD_INT_RESET_REG); | |
141 | /* mask the interrupt */ | |
142 | expio_mask_irq(irq); | |
143 | } | |
144 | ||
145 | /* | |
146 | * Enable a expio pin's interrupt by clearing the bit in the imr. | |
147 | * @param irq a expio virtual irq number | |
148 | */ | |
149 | static void expio_unmask_irq(uint32_t irq) | |
150 | { | |
151 | uint16_t reg; | |
152 | uint32_t expio = MXC_IRQ_TO_EXPIO(irq); | |
153 | ||
154 | /* unmask the interrupt */ | |
155 | reg = __raw_readw(CPLD_INT_MASK_REG); | |
156 | reg &= ~(1 << expio); | |
157 | __raw_writew(reg, CPLD_INT_MASK_REG); | |
158 | } | |
159 | ||
160 | static struct irq_chip expio_irq_chip = { | |
161 | .ack = expio_ack_irq, | |
162 | .mask = expio_mask_irq, | |
163 | .unmask = expio_unmask_irq, | |
164 | }; | |
165 | ||
11a332ad | 166 | static int __init mx31_3ds_init_expio(void) |
135cad36 ML |
167 | { |
168 | int i; | |
169 | int ret; | |
170 | ||
171 | /* Check if there's a debug board connected */ | |
172 | if ((__raw_readw(CPLD_MAGIC_NUMBER1_REG) != 0xAAAA) || | |
173 | (__raw_readw(CPLD_MAGIC_NUMBER2_REG) != 0x5555) || | |
174 | (__raw_readw(CPLD_MAGIC_NUMBER3_REG) != 0xCAFE)) { | |
175 | /* No Debug board found */ | |
176 | return -ENODEV; | |
177 | } | |
178 | ||
11a332ad | 179 | pr_info("i.MX31 3DS Debug board detected, rev = 0x%04X\n", |
135cad36 ML |
180 | __raw_readw(CPLD_CODE_VER_REG)); |
181 | ||
182 | /* | |
183 | * Configure INT line as GPIO input | |
184 | */ | |
185 | ret = gpio_request(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1), "sms9217-irq"); | |
186 | if (ret) | |
187 | pr_warning("could not get LAN irq gpio\n"); | |
188 | else | |
189 | gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1)); | |
190 | ||
191 | /* Disable the interrupts and clear the status */ | |
192 | __raw_writew(0, CPLD_INT_MASK_REG); | |
193 | __raw_writew(0xFFFF, CPLD_INT_RESET_REG); | |
194 | __raw_writew(0, CPLD_INT_RESET_REG); | |
195 | __raw_writew(0x1F, CPLD_INT_MASK_REG); | |
196 | for (i = MXC_EXP_IO_BASE; | |
197 | i < (MXC_EXP_IO_BASE + MXC_MAX_EXP_IO_LINES); | |
198 | i++) { | |
199 | set_irq_chip(i, &expio_irq_chip); | |
200 | set_irq_handler(i, handle_level_irq); | |
201 | set_irq_flags(i, IRQF_VALID); | |
202 | } | |
203 | set_irq_type(EXPIO_PARENT_INT, IRQ_TYPE_LEVEL_LOW); | |
11a332ad | 204 | set_irq_chained_handler(EXPIO_PARENT_INT, mx31_3ds_expio_irq_handler); |
135cad36 ML |
205 | |
206 | return 0; | |
207 | } | |
208 | ||
209 | /* | |
210 | * This structure defines the MX31 memory map. | |
211 | */ | |
11a332ad | 212 | static struct map_desc mx31_3ds_io_desc[] __initdata = { |
135cad36 | 213 | { |
f568dd7f UKK |
214 | .virtual = MX31_CS5_BASE_ADDR_VIRT, |
215 | .pfn = __phys_to_pfn(MX31_CS5_BASE_ADDR), | |
216 | .length = MX31_CS5_SIZE, | |
135cad36 ML |
217 | .type = MT_DEVICE, |
218 | }, | |
219 | }; | |
220 | ||
221 | /* | |
222 | * Set up static virtual mappings. | |
223 | */ | |
11a332ad | 224 | static void __init mx31_3ds_map_io(void) |
135cad36 ML |
225 | { |
226 | mx31_map_io(); | |
11a332ad | 227 | iotable_init(mx31_3ds_io_desc, ARRAY_SIZE(mx31_3ds_io_desc)); |
135cad36 ML |
228 | } |
229 | ||
1553a1ec FE |
230 | /*! |
231 | * Board specific initialization. | |
232 | */ | |
233 | static void __init mxc_board_init(void) | |
234 | { | |
11a332ad AP |
235 | mxc_iomux_setup_multiple_pins(mx31_3ds_pins, ARRAY_SIZE(mx31_3ds_pins), |
236 | "mx31_3ds"); | |
153fa1d8 ML |
237 | |
238 | mxc_register_device(&mxc_uart_device0, &uart_pdata); | |
135cad36 | 239 | |
11a332ad | 240 | if (!mx31_3ds_init_expio()) |
2b0c3677 | 241 | platform_device_register(&smsc911x_device); |
1553a1ec FE |
242 | } |
243 | ||
11a332ad | 244 | static void __init mx31_3ds_timer_init(void) |
1553a1ec | 245 | { |
30c730f8 | 246 | mx31_clocks_init(26000000); |
1553a1ec FE |
247 | } |
248 | ||
11a332ad AP |
249 | static struct sys_timer mx31_3ds_timer = { |
250 | .init = mx31_3ds_timer_init, | |
1553a1ec FE |
251 | }; |
252 | ||
253 | /* | |
254 | * The following uses standard kernel macros defined in arch.h in order to | |
11a332ad | 255 | * initialize __mach_desc_MX31_3DS data structure. |
1553a1ec FE |
256 | */ |
257 | MACHINE_START(MX31_3DS, "Freescale MX31PDK (3DS)") | |
258 | /* Maintainer: Freescale Semiconductor, Inc. */ | |
f568dd7f | 259 | .phys_io = MX31_AIPS1_BASE_ADDR, |
321ed164 | 260 | .io_pg_offst = (MX31_AIPS1_BASE_ADDR_VIRT >> 18) & 0xfffc, |
34101237 | 261 | .boot_params = MX3x_PHYS_OFFSET + 0x100, |
11a332ad | 262 | .map_io = mx31_3ds_map_io, |
c5aa0ad0 | 263 | .init_irq = mx31_init_irq, |
1553a1ec | 264 | .init_machine = mxc_board_init, |
11a332ad | 265 | .timer = &mx31_3ds_timer, |
1553a1ec | 266 | MACHINE_END |