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/arch/sh/boards/se/7751/setup.c

https://bitbucket.org/evzijst/gittest
C | 228 lines | 147 code | 36 blank | 45 comment | 9 complexity | bca1a732a85dc2340e50f283ef7ff3f4 MD5 | raw file
  1/* 
  2 * linux/arch/sh/kernel/setup_7751se.c
  3 *
  4 * Copyright (C) 2000  Kazumoto Kojima
  5 *
  6 * Hitachi SolutionEngine Support.
  7 *
  8 * Modified for 7751 Solution Engine by
  9 * Ian da Silva and Jeremy Siegel, 2001.
 10 */
 11
 12#include <linux/config.h>
 13#include <linux/init.h>
 14#include <linux/irq.h>
 15
 16#include <linux/hdreg.h>
 17#include <linux/ide.h>
 18#include <asm/io.h>
 19#include <asm/se7751/se7751.h>
 20
 21#ifdef CONFIG_SH_KGDB
 22#include <asm/kgdb.h>
 23#endif
 24
 25/*
 26 * Configure the Super I/O chip
 27 */
 28#if 0
 29/* Leftover code from regular Solution Engine, for reference. */
 30/* The SH7751 Solution Engine has a different SuperIO. */
 31static void __init smsc_config(int index, int data)
 32{
 33	outb_p(index, INDEX_PORT);
 34	outb_p(data, DATA_PORT);
 35}
 36
 37static void __init init_smsc(void)
 38{
 39	outb_p(CONFIG_ENTER, CONFIG_PORT);
 40	outb_p(CONFIG_ENTER, CONFIG_PORT);
 41
 42	/* FDC */
 43	smsc_config(CURRENT_LDN_INDEX, LDN_FDC);
 44	smsc_config(ACTIVATE_INDEX, 0x01);
 45	smsc_config(IRQ_SELECT_INDEX, 6); /* IRQ6 */
 46
 47	/* IDE1 */
 48	smsc_config(CURRENT_LDN_INDEX, LDN_IDE1);
 49	smsc_config(ACTIVATE_INDEX, 0x01);
 50	smsc_config(IRQ_SELECT_INDEX, 14); /* IRQ14 */
 51
 52	/* AUXIO (GPIO): to use IDE1 */
 53	smsc_config(CURRENT_LDN_INDEX, LDN_AUXIO);
 54	smsc_config(GPIO46_INDEX, 0x00); /* nIOROP */
 55	smsc_config(GPIO47_INDEX, 0x00); /* nIOWOP */
 56
 57	/* COM1 */
 58	smsc_config(CURRENT_LDN_INDEX, LDN_COM1);
 59	smsc_config(ACTIVATE_INDEX, 0x01);
 60	smsc_config(IO_BASE_HI_INDEX, 0x03);
 61	smsc_config(IO_BASE_LO_INDEX, 0xf8);
 62	smsc_config(IRQ_SELECT_INDEX, 4); /* IRQ4 */
 63
 64	/* COM2 */
 65	smsc_config(CURRENT_LDN_INDEX, LDN_COM2);
 66	smsc_config(ACTIVATE_INDEX, 0x01);
 67	smsc_config(IO_BASE_HI_INDEX, 0x02);
 68	smsc_config(IO_BASE_LO_INDEX, 0xf8);
 69	smsc_config(IRQ_SELECT_INDEX, 3); /* IRQ3 */
 70
 71	/* RTC */
 72	smsc_config(CURRENT_LDN_INDEX, LDN_RTC);
 73	smsc_config(ACTIVATE_INDEX, 0x01);
 74	smsc_config(IRQ_SELECT_INDEX, 8); /* IRQ8 */
 75
 76	/* XXX: PARPORT, KBD, and MOUSE will come here... */
 77	outb_p(CONFIG_EXIT, CONFIG_PORT);
 78}
 79#endif
 80
 81const char *get_system_type(void)
 82{
 83	return "7751 SolutionEngine";
 84}
 85
 86#ifdef CONFIG_SH_KGDB
 87static int kgdb_uart_setup(void);
 88static struct kgdb_sermap kgdb_uart_sermap = 
 89{ "ttyS", 0, kgdb_uart_setup, NULL };
 90#endif
 91 
 92/*
 93 * Initialize the board
 94 */
 95void __init platform_setup(void)
 96{
 97	/* Call init_smsc() replacement to set up SuperIO. */
 98	/* XXX: RTC setting comes here */
 99#ifdef CONFIG_SH_KGDB
100	kgdb_register_sermap(&kgdb_uart_sermap);
101#endif
102}
103
104/*********************************************************************
105 * Currently a hack (e.g. does not interact well w/serial.c, lots of *
106 * hardcoded stuff) but may be useful if SCI/F needs debugging.      *
107 * Mostly copied from x86 code (see files asm-i386/kgdb_local.h and  *
108 * arch/i386/lib/kgdb_serial.c).                                     *
109 *********************************************************************/
110
111#ifdef CONFIG_SH_KGDB
112#include <linux/types.h>
113#include <linux/serial.h>
114#include <linux/serialP.h>
115#include <linux/serial_reg.h>
116
117#define COM1_PORT 0x3f8  /* Base I/O address */
118#define COM1_IRQ  4      /* IRQ not used yet */
119#define COM2_PORT 0x2f8  /* Base I/O address */
120#define COM2_IRQ  3      /* IRQ not used yet */
121
122#define SB_CLOCK 1843200 /* Serial baud clock */
123#define SB_BASE (SB_CLOCK/16)
124#define SB_MCR UART_MCR_OUT2 | UART_MCR_DTR | UART_MCR_RTS
125
126struct uart_port {
127	int base;
128};
129#define UART_NPORTS 2
130struct uart_port uart_ports[] = {
131	{ COM1_PORT },
132	{ COM2_PORT },
133};
134struct uart_port *kgdb_uart_port;
135
136#define UART_IN(reg)	inb_p(kgdb_uart_port->base + reg)
137#define UART_OUT(reg,v)	outb_p((v), kgdb_uart_port->base + reg)
138
139/* Basic read/write functions for the UART */
140#define UART_LSR_RXCERR    (UART_LSR_BI | UART_LSR_FE | UART_LSR_PE)
141static int kgdb_uart_getchar(void)
142{
143	int lsr;
144	int c = -1;
145
146	while (c == -1) {
147		lsr = UART_IN(UART_LSR);
148		if (lsr & UART_LSR_DR) 
149			c = UART_IN(UART_RX);
150		if ((lsr & UART_LSR_RXCERR))
151			c = -1;
152	}
153	return c;
154}
155
156static void kgdb_uart_putchar(int c)
157{
158	while ((UART_IN(UART_LSR) & UART_LSR_THRE) == 0)
159		;
160	UART_OUT(UART_TX, c);
161}
162
163/*
164 * Initialize UART to configured/requested values.
165 * (But we don't interrupts yet, or interact w/serial.c)
166 */
167static int kgdb_uart_setup(void)
168{
169	int port;
170	int lcr = 0;
171	int bdiv = 0;
172
173	if (kgdb_portnum >= UART_NPORTS) {
174		KGDB_PRINTK("uart port %d invalid.\n", kgdb_portnum);
175		return -1;
176	}
177
178	kgdb_uart_port = &uart_ports[kgdb_portnum];
179
180	/* Init sequence from gdb_hook_interrupt */
181	UART_IN(UART_RX);
182	UART_OUT(UART_IER, 0);
183
184	UART_IN(UART_RX);	/* Serial driver comments say */
185	UART_IN(UART_IIR);	/* this clears interrupt regs */
186	UART_IN(UART_MSR);
187
188	/* Figure basic LCR values */
189	switch (kgdb_bits) {
190	case '7':
191		lcr |= UART_LCR_WLEN7;
192		break;
193	default: case '8': 
194		lcr |= UART_LCR_WLEN8;
195		break;
196	}
197	switch (kgdb_parity) {
198	case 'O':
199		lcr |= UART_LCR_PARITY;
200		break;
201	case 'E':
202		lcr |= (UART_LCR_PARITY | UART_LCR_EPAR);
203		break;
204	default: break;
205	}
206
207	/* Figure the baud rate divisor */
208	bdiv = (SB_BASE/kgdb_baud);
209	
210	/* Set the baud rate and LCR values */
211	UART_OUT(UART_LCR, (lcr | UART_LCR_DLAB));
212	UART_OUT(UART_DLL, (bdiv & 0xff));
213	UART_OUT(UART_DLM, ((bdiv >> 8) & 0xff));
214	UART_OUT(UART_LCR, lcr);
215
216	/* Set the MCR */
217	UART_OUT(UART_MCR, SB_MCR);
218
219	/* Turn off FIFOs for now */
220	UART_OUT(UART_FCR, 0);
221
222	/* Setup complete: initialize function pointers */
223	kgdb_getchar = kgdb_uart_getchar;
224	kgdb_putchar = kgdb_uart_putchar;
225
226	return 0;
227}
228#endif /* CONFIG_SH_KGDB */