2 * arch/ppc/platforms/85xx/stx_gp3.c
4 * STx GP3 board specific routines
6 * Dan Malek <dan@embeddededge.com>
7 * Copyright 2004 Embedded Edge, LLC
9 * Copied from mpc8560_ads.c
10 * Copyright 2002, 2003 Motorola Inc.
12 * Ported to 2.6, Matt Porter <mporter@kernel.crashing.org>
13 * Copyright 2004-2005 MontaVista Software, Inc.
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
21 #include <linux/config.h>
22 #include <linux/stddef.h>
23 #include <linux/kernel.h>
24 #include <linux/init.h>
25 #include <linux/errno.h>
26 #include <linux/reboot.h>
27 #include <linux/pci.h>
28 #include <linux/kdev_t.h>
29 #include <linux/major.h>
30 #include <linux/blkdev.h>
31 #include <linux/console.h>
32 #include <linux/delay.h>
33 #include <linux/irq.h>
34 #include <linux/root_dev.h>
35 #include <linux/seq_file.h>
36 #include <linux/serial.h>
37 #include <linux/initrd.h>
38 #include <linux/module.h>
39 #include <linux/fsl_devices.h>
40 #include <linux/interrupt.h>
42 #include <asm/system.h>
43 #include <asm/pgtable.h>
45 #include <asm/atomic.h>
48 #include <asm/machdep.h>
49 #include <asm/open_pic.h>
50 #include <asm/bootinfo.h>
51 #include <asm/pci-bridge.h>
52 #include <asm/mpc85xx.h>
54 #include <asm/immap_85xx.h>
55 #include <asm/immap_cpm2.h>
56 #include <asm/mpc85xx.h>
57 #include <asm/ppc_sys.h>
59 #include <syslib/cpm2_pic.h>
60 #include <syslib/ppc85xx_common.h>
62 extern void cpm2_reset(void);
64 unsigned char __res[sizeof(bd_t)];
67 unsigned long isa_io_base = 0;
68 unsigned long isa_mem_base = 0;
69 unsigned long pci_dram_offset = 0;
72 /* Internal interrupts are all Level Sensitive, and Positive Polarity */
73 static u8 gp3_openpic_initsenses[] __initdata = {
74 MPC85XX_INTERNAL_IRQ_SENSES,
75 0x0, /* External 0: */
76 #if defined(CONFIG_PCI)
77 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 1: PCI slot 0 */
78 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 2: PCI slot 1 */
79 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 3: PCI slot 2 */
80 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 4: PCI slot 3 */
82 0x0, /* External 1: */
83 0x0, /* External 2: */
84 0x0, /* External 3: */
85 0x0, /* External 4: */
87 0x0, /* External 5: */
88 0x0, /* External 6: */
89 0x0, /* External 7: */
90 0x0, /* External 8: */
91 0x0, /* External 9: */
92 0x0, /* External 10: */
93 0x0, /* External 11: */
97 * Setup the architecture
102 bd_t *binfo = (bd_t *) __res;
104 struct gianfar_platform_data *pdata;
108 /* get the core frequency */
109 freq = binfo->bi_intfreq;
112 ppc_md.progress("gp3_setup_arch()", 0);
114 /* Set loops_per_jiffy to a half-way reasonable value,
115 for use until calibrate_delay gets called. */
116 loops_per_jiffy = freq / HZ;
119 /* setup PCI host bridges */
120 mpc85xx_setup_hose();
123 /* setup the board related information for the enet controllers */
124 pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC1);
125 /* pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR; */
126 pdata->interruptPHY = MPC85xx_IRQ_EXT5;
128 pdata->phy_reg_addr += binfo->bi_immr_base;
129 memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
131 pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC2);
132 /* pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR; */
133 pdata->interruptPHY = MPC85xx_IRQ_EXT5;
135 /* fixup phy address */
136 pdata->phy_reg_addr += binfo->bi_immr_base;
137 memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
139 #ifdef CONFIG_BLK_DEV_INITRD
141 ROOT_DEV = Root_RAM0;
144 #ifdef CONFIG_ROOT_NFS
147 ROOT_DEV = Root_HDA1;
150 printk ("bi_immr_base = %8.8lx\n", binfo->bi_immr_base);
153 static irqreturn_t cpm2_cascade(int irq, void *dev_id, struct pt_regs *regs)
155 while ((irq = cpm2_get_irq(regs)) >= 0)
161 static struct irqaction cpm2_irqaction = {
162 .handler = cpm2_cascade,
163 .flags = SA_INTERRUPT,
164 .mask = CPU_MASK_NONE,
165 .name = "cpm2_cascade",
171 bd_t *binfo = (bd_t *) __res;
177 /* Determine the Physical Address of the OpenPIC regs */
178 phys_addr_t OpenPIC_PAddr =
179 binfo->bi_immr_base + MPC85xx_OPENPIC_OFFSET;
180 OpenPIC_Addr = ioremap(OpenPIC_PAddr, MPC85xx_OPENPIC_SIZE);
181 OpenPIC_InitSenses = gp3_openpic_initsenses;
182 OpenPIC_NumInitSenses = sizeof (gp3_openpic_initsenses);
184 /* Skip reserved space and internal sources */
185 openpic_set_sources(0, 32, OpenPIC_Addr + 0x10200);
187 /* Map PIC IRQs 0-11 */
188 openpic_set_sources(48, 12, OpenPIC_Addr + 0x10000);
191 * Let openpic interrupts starting from an offset, to
192 * leave space for cascading interrupts underneath.
194 openpic_init(MPC85xx_OPENPIC_IRQ_OFFSET);
199 setup_irq(MPC85xx_IRQ_CPM, &cpm2_irqaction);
205 gp3_show_cpuinfo(struct seq_file *m)
207 uint pvid, svid, phid1;
208 bd_t *binfo = (bd_t *) __res;
211 extern unsigned long total_memory; /* in mm/init */
213 /* get the core frequency */
214 freq = binfo->bi_intfreq;
216 pvid = mfspr(SPRN_PVR);
217 svid = mfspr(SPRN_SVR);
219 memsize = total_memory;
221 seq_printf(m, "Vendor\t\t: RPC Electronics STx \n");
222 seq_printf(m, "Machine\t\t: GP3 - MPC%s\n", cur_ppc_sys_spec->ppc_sys_name);
223 seq_printf(m, "bus freq\t: %u.%.6u MHz\n", freq / 1000000,
225 seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
226 seq_printf(m, "SVR\t\t: 0x%x\n", svid);
228 /* Display cpu Pll setting */
229 phid1 = mfspr(SPRN_HID1);
230 seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
232 /* Display the amount of memory */
233 seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
239 int mpc85xx_map_irq(struct pci_dev *dev, unsigned char idsel,
242 static char pci_irq_table[][4] =
244 * PCI IDSEL/INTPIN->INTLINE
248 {PIRQA, PIRQB, PIRQC, PIRQD},
249 {PIRQD, PIRQA, PIRQB, PIRQC},
250 {PIRQC, PIRQD, PIRQA, PIRQB},
251 {PIRQB, PIRQC, PIRQD, PIRQA},
254 const long min_idsel = 12, max_idsel = 15, irqs_per_slot = 4;
255 return PCI_IRQ_TABLE_LOOKUP;
258 int mpc85xx_exclude_device(u_char bus, u_char devfn)
260 if (bus == 0 && PCI_SLOT(devfn) == 0)
261 return PCIBIOS_DEVICE_NOT_FOUND;
263 return PCIBIOS_SUCCESSFUL;
265 #endif /* CONFIG_PCI */
268 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
269 unsigned long r6, unsigned long r7)
271 /* parse_bootinfo must always be called first */
272 parse_bootinfo(find_bootinfo());
275 * If we were passed in a board information, copy it into the
276 * residual data area.
279 memcpy((void *) __res, (void *) (r3 + KERNELBASE),
283 #if defined(CONFIG_BLK_DEV_INITRD)
285 * If the init RAM disk has been configured in, and there's a valid
286 * starting address for it, set it up.
289 initrd_start = r4 + KERNELBASE;
290 initrd_end = r5 + KERNELBASE;
292 #endif /* CONFIG_BLK_DEV_INITRD */
294 /* Copy the kernel command line arguments to a safe place. */
297 *(char *) (r7 + KERNELBASE) = 0;
298 strcpy(cmd_line, (char *) (r6 + KERNELBASE));
301 identify_ppc_sys_by_id(mfspr(SPRN_SVR));
303 /* setup the PowerPC module struct */
304 ppc_md.setup_arch = gp3_setup_arch;
305 ppc_md.show_cpuinfo = gp3_show_cpuinfo;
307 ppc_md.init_IRQ = gp3_init_IRQ;
308 ppc_md.get_irq = openpic_get_irq;
310 ppc_md.restart = mpc85xx_restart;
311 ppc_md.power_off = mpc85xx_power_off;
312 ppc_md.halt = mpc85xx_halt;
314 ppc_md.find_end_of_memory = mpc85xx_find_end_of_memory;
316 ppc_md.calibrate_decr = mpc85xx_calibrate_decr;
319 ppc_md.progress("platform_init(): exit", 0);