1/*
2 * linux/arch/arm/mach-sa1100/adsbitsy.c
3 *
4 * Author: Woojung Huh
5 *
6 * Pieces specific to the ADS Bitsy
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/init.h>
14#include <linux/sched.h>
15#include <linux/interrupt.h>
16#include <linux/ptrace.h>
17#include <linux/serial_core.h>
18
19#include <asm/hardware.h>
20#include <asm/setup.h>
21#include <asm/irq.h>
22
23#include <asm/mach/irq.h>
24#include <asm/mach/arch.h>
25#include <asm/mach/map.h>
26#include <asm/mach/serial_sa1100.h>
27
28#include <asm/arch/irq.h>
29
30#include "generic.h"
31#include "sa1111.h"
32
33static int __init adsbitsy_init(void)
34{
35	int ret;
36
37	if (!machine_is_adsbitsy())
38		return -ENODEV;
39
40	/*
41	 * Ensure that the memory bus request/grant signals are setup,
42	 * and the grant is held in its inactive state
43	 */
44	sa1110_mb_disable();
45
46	/*
47	 * Reset SA1111
48	 */
49	GPCR |= GPIO_GPIO26;
50	udelay(1000);
51	GPSR |= GPIO_GPIO26;
52
53	/*
54	 * Probe for SA1111.
55	 */
56	ret = sa1111_probe(ADSBITSY_SA1111_BASE);
57	if (ret < 0)
58		return ret;
59
60	/*
61	 * We found it.  Wake the chip up.
62	 */
63	sa1111_wake();
64
65	/*
66	 * The SDRAM configuration of the SA1110 and the SA1111 must
67	 * match.  This is very important to ensure that SA1111 accesses
68	 * don't corrupt the SDRAM.  Note that this ungates the SA1111's
69	 * MBGNT signal, so we must have called sa1110_mb_disable()
70	 * beforehand.
71	 */
72	sa1111_configure_smc(1,
73			     FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
74			     FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
75
76	/*
77	 * Enable PWM control for LCD
78	 */
79	SKPCR |= SKPCR_PWMCLKEN;
80	SKPWM0 = 0x7F;				// VEE
81	SKPEN0 = 1;
82	SKPWM1 = 0x01;				// Backlight
83	SKPEN1 = 1;
84
85	/*
86	 * We only need to turn on DCLK whenever we want to use the
87	 * DMA.  It can otherwise be held firmly in the off position.
88	 */
89	SKPCR |= SKPCR_DCLKEN;
90
91	/*
92	 * Enable the SA1110 memory bus request and grant signals.
93	 */
94	sa1110_mb_enable();
95
96	set_GPIO_IRQ_edge(GPIO_GPIO0, GPIO_RISING_EDGE);
97	sa1111_init_irq(IRQ_GPIO0);
98
99	return 0;
100}
101
102__initcall(adsbitsy_init);
103
104static void __init adsbitsy_init_irq(void)
105{
106	/* First the standard SA1100 IRQs */
107	sa1100_init_irq();
108}
109
110
111/*
112 * Initialization fixup
113 */
114
115static void __init
116fixup_adsbitsy(struct machine_desc *desc, struct param_struct *params,
117		     char **cmdline, struct meminfo *mi)
118{
119	SET_BANK( 0, 0xc0000000, 32*1024*1024 );
120	mi->nr_banks = 1;
121
122	ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
123	setup_ramdisk( 1, 0, 0, 8192 );
124	setup_initrd( __phys_to_virt(0xc0800000), 4*1024*1024 );
125}
126
127static struct map_desc adsbitsy_io_desc[] __initdata = {
128 /* virtual     physical    length      domain     r  w  c  b */
129  { 0xe8000000, 0x08000000, 0x01000000, DOMAIN_IO, 0, 1, 0, 0 }, /* Flash bank 1 */
130  { 0xf4000000, 0x18000000, 0x00800000, DOMAIN_IO, 0, 1, 0, 0 }, /* SA1111 */
131  LAST_DESC
132};
133
134static int adsbitsy_uart_open(struct uart_port *port, struct uart_info *info)
135{
136	if (port->mapbase == _Ser1UTCR0) {
137		Ser1SDCR0 |= SDCR0_UART;
138#error Fixme	// Set RTS High (should be done in the set_mctrl fn)
139		GPCR = GPIO_GPIO15;
140	} else if (port->mapbase == _Ser2UTCR0) {
141		Ser2UTCR4 = Ser2HSCR0 = 0;
142#error Fixme	// Set RTS High (should be done in the set_mctrl fn)
143		GPCR = GPIO_GPIO17;
144	} else if (port->mapbase == _Ser2UTCR0) {
145#error Fixme	// Set RTS High (should be done in the set_mctrl fn)
146		GPCR = GPIO_GPIO19;
147	}
148	return 0;
149}
150
151static struct sa1100_port_fns adsbitsy_port_fns __initdata = {
152	open:	adsbitsy_uart_open,
153};
154
155static void __init adsbitsy_map_io(void)
156{
157	sa1100_map_io();
158	iotable_init(adsbitsy_io_desc);
159
160	sa1100_register_uart_fns(&adsbitsy_port_fns);
161	sa1100_register_uart(0, 3);
162	sa1100_register_uart(1, 1);
163	sa1100_register_uart(2, 2);
164	GPDR |= GPIO_GPIO15 | GPIO_GPIO17 | GPIO_GPIO19;
165	GPDR &= ~(GPIO_GPIO14 | GPIO_GPIO16 | GPIO_GPIO18);
166}
167
168MACHINE_START(ADSBITSY, "ADS Bitsy")
169	BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
170	FIXUP(fixup_adsbitsy)
171	MAPIO(adsbitsy_map_io)
172	INITIRQ(adsbitsy_init_irq)
173MACHINE_END
174