1/*
2 * MPC8540ADS board specific routines
3 *
4 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
5 *
6 * Copyright 2004 Freescale Semiconductor Inc.
7 *
8 * This program is free software; you can redistribute  it and/or modify it
9 * under  the terms of  the GNU General  Public License as published by the
10 * Free Software Foundation;  either version 2 of the  License, or (at your
11 * option) any later version.
12 */
13
14#include <linux/stddef.h>
15#include <linux/kernel.h>
16#include <linux/init.h>
17#include <linux/errno.h>
18#include <linux/reboot.h>
19#include <linux/pci.h>
20#include <linux/kdev_t.h>
21#include <linux/major.h>
22#include <linux/console.h>
23#include <linux/delay.h>
24#include <linux/seq_file.h>
25#include <linux/root_dev.h>
26#include <linux/serial.h>
27#include <linux/tty.h>	/* for linux/serial_core.h */
28#include <linux/serial_core.h>
29#include <linux/initrd.h>
30#include <linux/module.h>
31#include <linux/fsl_devices.h>
32
33#include <asm/system.h>
34#include <asm/pgtable.h>
35#include <asm/page.h>
36#include <asm/atomic.h>
37#include <asm/time.h>
38#include <asm/io.h>
39#include <asm/machdep.h>
40#include <asm/open_pic.h>
41#include <asm/bootinfo.h>
42#include <asm/pci-bridge.h>
43#include <asm/mpc85xx.h>
44#include <asm/irq.h>
45#include <asm/immap_85xx.h>
46#include <asm/kgdb.h>
47#include <asm/ppc_sys.h>
48#include <mm/mmu_decl.h>
49
50#include <syslib/ppc85xx_setup.h>
51
52/* ************************************************************************
53 *
54 * Setup the architecture
55 *
56 */
57static void __init
58mpc8540ads_setup_arch(void)
59{
60	bd_t *binfo = (bd_t *) __res;
61	unsigned int freq;
62	struct gianfar_platform_data *pdata;
63	struct gianfar_mdio_data *mdata;
64
65	/* get the core frequency */
66	freq = binfo->bi_intfreq;
67
68	if (ppc_md.progress)
69		ppc_md.progress("mpc8540ads_setup_arch()", 0);
70
71	/* Set loops_per_jiffy to a half-way reasonable value,
72	   for use until calibrate_delay gets called. */
73	loops_per_jiffy = freq / HZ;
74
75#ifdef CONFIG_PCI
76	/* setup PCI host bridges */
77	mpc85xx_setup_hose();
78#endif
79
80#ifdef CONFIG_SERIAL_8250
81	mpc85xx_early_serial_map();
82#endif
83
84#ifdef CONFIG_SERIAL_TEXT_DEBUG
85	/* Invalidate the entry we stole earlier the serial ports
86	 * should be properly mapped */
87	invalidate_tlbcam_entry(num_tlbcam_entries - 1);
88#endif
89
90	/* setup the board related info for the MDIO bus */
91	mdata = (struct gianfar_mdio_data *) ppc_sys_get_pdata(MPC85xx_MDIO);
92
93	mdata->irq[0] = MPC85xx_IRQ_EXT5;
94	mdata->irq[1] = MPC85xx_IRQ_EXT5;
95	mdata->irq[2] = PHY_POLL;
96	mdata->irq[3] = MPC85xx_IRQ_EXT5;
97	mdata->irq[31] = PHY_POLL;
98
99	/* setup the board related information for the enet controllers */
100	pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC1);
101	if (pdata) {
102		pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
103		pdata->bus_id = 0;
104		pdata->phy_id = 0;
105		memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
106	}
107
108	pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC2);
109	if (pdata) {
110		pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
111		pdata->bus_id = 0;
112		pdata->phy_id = 1;
113		memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
114	}
115
116	pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_FEC);
117	if (pdata) {
118		pdata->board_flags = 0;
119		pdata->bus_id = 0;
120		pdata->phy_id = 3;
121		memcpy(pdata->mac_addr, binfo->bi_enet2addr, 6);
122	}
123
124#ifdef CONFIG_BLK_DEV_INITRD
125	if (initrd_start)
126		ROOT_DEV = Root_RAM0;
127	else
128#endif
129#ifdef  CONFIG_ROOT_NFS
130		ROOT_DEV = Root_NFS;
131#else
132		ROOT_DEV = Root_HDA1;
133#endif
134}
135
136/* ************************************************************************ */
137void __init
138platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
139	      unsigned long r6, unsigned long r7)
140{
141	/* parse_bootinfo must always be called first */
142	parse_bootinfo(find_bootinfo());
143
144	/*
145	 * If we were passed in a board information, copy it into the
146	 * residual data area.
147	 */
148	if (r3) {
149		memcpy((void *) __res, (void *) (r3 + KERNELBASE),
150		       sizeof (bd_t));
151	}
152#ifdef CONFIG_SERIAL_TEXT_DEBUG
153	{
154		bd_t *binfo = (bd_t *) __res;
155		struct uart_port p;
156
157		/* Use the last TLB entry to map CCSRBAR to allow access to DUART regs */
158		settlbcam(num_tlbcam_entries - 1, binfo->bi_immr_base,
159			  binfo->bi_immr_base, MPC85xx_CCSRBAR_SIZE, _PAGE_IO, 0);
160
161		memset(&p, 0, sizeof (p));
162		p.iotype = UPIO_MEM;
163		p.membase = (void *) binfo->bi_immr_base + MPC85xx_UART0_OFFSET;
164		p.uartclk = binfo->bi_busfreq;
165
166		gen550_init(0, &p);
167
168		memset(&p, 0, sizeof (p));
169		p.iotype = UPIO_MEM;
170		p.membase = (void *) binfo->bi_immr_base + MPC85xx_UART1_OFFSET;
171		p.uartclk = binfo->bi_busfreq;
172
173		gen550_init(1, &p);
174	}
175#endif
176
177#if defined(CONFIG_BLK_DEV_INITRD)
178	/*
179	 * If the init RAM disk has been configured in, and there's a valid
180	 * starting address for it, set it up.
181	 */
182	if (r4) {
183		initrd_start = r4 + KERNELBASE;
184		initrd_end = r5 + KERNELBASE;
185	}
186#endif				/* CONFIG_BLK_DEV_INITRD */
187
188	/* Copy the kernel command line arguments to a safe place. */
189
190	if (r6) {
191		*(char *) (r7 + KERNELBASE) = 0;
192		strcpy(cmd_line, (char *) (r6 + KERNELBASE));
193	}
194
195	identify_ppc_sys_by_id(mfspr(SPRN_SVR));
196
197	/* setup the PowerPC module struct */
198	ppc_md.setup_arch = mpc8540ads_setup_arch;
199	ppc_md.show_cpuinfo = mpc85xx_ads_show_cpuinfo;
200
201	ppc_md.init_IRQ = mpc85xx_ads_init_IRQ;
202	ppc_md.get_irq = openpic_get_irq;
203
204	ppc_md.restart = mpc85xx_restart;
205	ppc_md.power_off = mpc85xx_power_off;
206	ppc_md.halt = mpc85xx_halt;
207
208	ppc_md.find_end_of_memory = mpc85xx_find_end_of_memory;
209
210	ppc_md.time_init = NULL;
211	ppc_md.set_rtc_time = NULL;
212	ppc_md.get_rtc_time = NULL;
213	ppc_md.calibrate_decr = mpc85xx_calibrate_decr;
214
215#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_SERIAL_TEXT_DEBUG)
216	ppc_md.progress = gen550_progress;
217#endif	/* CONFIG_SERIAL_8250 && CONFIG_SERIAL_TEXT_DEBUG */
218#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_KGDB)
219	ppc_md.early_serial_map = mpc85xx_early_serial_map;
220#endif	/* CONFIG_SERIAL_8250 && CONFIG_KGDB */
221
222	if (ppc_md.progress)
223		ppc_md.progress("mpc8540ads_init(): exit", 0);
224
225	return;
226}
227