2 * arch/ppc/platforms/4xx/ep405.c
4 * Embedded Planet 405GP board
5 * http://www.embeddedplanet.com
7 * Author: Matthew Locke <mlocke@mvista.com>
9 * 2001 (c) MontaVista, Software, Inc. This file is licensed under
10 * the terms of the GNU General Public License version 2. This program
11 * is licensed "as is" without any warranty of any kind, whether express
14 #include <linux/config.h>
15 #include <linux/init.h>
16 #include <linux/pci.h>
17 #include <asm/system.h>
18 #include <asm/pci-bridge.h>
19 #include <asm/machdep.h>
22 #include <asm/ibm_ocp_pci.h>
26 #define DBG(x...) printk(x)
38 } ep405_devtable[] = {
40 {0x07, 0x0E, 25}, /* EP405PC: USB */
45 ppc405_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
49 /* AFAICT this is only called a few times during PCI setup, so
50 performance is not critical */
51 for (i = 0; i < ARRAY_SIZE(ep405_devtable); i++) {
52 if (idsel == ep405_devtable[i].pci_idsel)
53 return ep405_devtable[i].irq;
59 ep405_setup_arch(void)
63 ibm_ocp_set_emac(0, 0);
65 if (__res.bi_nvramsize == 512*1024) {
66 /* FIXME: we should properly handle NVRTCs of different sizes */
67 TODC_INIT(TODC_TYPE_DS1557, ep405_nvram, ep405_nvram, ep405_nvram, 8);
72 bios_fixup(struct pci_controller *hose, struct pcil0_regs *pcip)
74 unsigned int bar_response, bar;
76 * Expected PCI mapping:
78 * PLB addr PCI memory addr
79 * --------------------- ---------------------
80 * 0000'0000 - 7fff'ffff <--- 0000'0000 - 7fff'ffff
81 * 8000'0000 - Bfff'ffff ---> 8000'0000 - Bfff'ffff
83 * PLB addr PCI io addr
84 * --------------------- ---------------------
85 * e800'0000 - e800'ffff ---> 0000'0000 - 0001'0000
89 /* Disable region zero first */
90 out_le32((void *) &(pcip->pmm[0].ma), 0x00000000);
91 /* PLB starting addr, PCI: 0x80000000 */
92 out_le32((void *) &(pcip->pmm[0].la), 0x80000000);
93 /* PCI start addr, 0x80000000 */
94 out_le32((void *) &(pcip->pmm[0].pcila), PPC405_PCI_MEM_BASE);
95 /* 512MB range of PLB to PCI */
96 out_le32((void *) &(pcip->pmm[0].pciha), 0x00000000);
97 /* Enable no pre-fetch, enable region */
98 out_le32((void *) &(pcip->pmm[0].ma), ((0xffffffff -
99 (PPC405_PCI_UPPER_MEM -
100 PPC405_PCI_MEM_BASE)) | 0x01));
102 /* Disable region one */
103 out_le32((void *) &(pcip->pmm[1].ma), 0x00000000);
104 out_le32((void *) &(pcip->pmm[1].la), 0x00000000);
105 out_le32((void *) &(pcip->pmm[1].pcila), 0x00000000);
106 out_le32((void *) &(pcip->pmm[1].pciha), 0x00000000);
107 out_le32((void *) &(pcip->pmm[1].ma), 0x00000000);
108 out_le32((void *) &(pcip->ptm1ms), 0x00000000);
110 /* Disable region two */
111 out_le32((void *) &(pcip->pmm[2].ma), 0x00000000);
112 out_le32((void *) &(pcip->pmm[2].la), 0x00000000);
113 out_le32((void *) &(pcip->pmm[2].pcila), 0x00000000);
114 out_le32((void *) &(pcip->pmm[2].pciha), 0x00000000);
115 out_le32((void *) &(pcip->pmm[2].ma), 0x00000000);
116 out_le32((void *) &(pcip->ptm2ms), 0x00000000);
118 /* Configure PTM (PCI->PLB) region 1 */
119 out_le32((void *) &(pcip->ptm1la), 0x00000000); /* PLB base address */
120 /* Disable PTM region 2 */
121 out_le32((void *) &(pcip->ptm2ms), 0x00000000);
123 /* Zero config bars */
124 for (bar = PCI_BASE_ADDRESS_1; bar <= PCI_BASE_ADDRESS_2; bar += 4) {
125 early_write_config_dword(hose, hose->first_busno,
126 PCI_FUNC(hose->first_busno), bar,
128 early_read_config_dword(hose, hose->first_busno,
129 PCI_FUNC(hose->first_busno), bar,
131 DBG("BUS %d, device %d, Function %d bar 0x%8.8x is 0x%8.8x\n",
132 hose->first_busno, PCI_SLOT(hose->first_busno),
133 PCI_FUNC(hose->first_busno), bar, bar_response);
135 /* end work arround */
145 ep405_bcsr = ioremap(EP405_BCSR_PADDR, EP405_BCSR_SIZE);
147 if (bip->bi_nvramsize > 0) {
148 ep405_nvram = ioremap(EP405_NVRAM_PADDR, bip->bi_nvramsize);
159 /* Workaround for a bug in the firmware it incorrectly sets
160 the IRQ polarities for XIRQ0 and XIRQ1 */
161 mtdcr(DCRN_UIC_PR(DCRN_UIC0_BASE), 0xffffff80); /* set the polarity */
162 mtdcr(DCRN_UIC_SR(DCRN_UIC0_BASE), 0x00000060); /* clear bogus interrupts */
164 /* Activate the XIRQs from the CPLD */
165 writeb(0xf0, ep405_bcsr+10);
167 /* Set up IRQ routing */
168 for (i = 0; i < ARRAY_SIZE(ep405_devtable); i++) {
169 if ( (ep405_devtable[i].irq >= 25)
170 && (ep405_devtable[i].irq) <= 31) {
171 writeb(ep405_devtable[i].cpld_xirq_select, ep405_bcsr+5);
172 writeb(ep405_devtable[i].irq - 25, ep405_bcsr+6);
178 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
179 unsigned long r6, unsigned long r7)
181 ppc4xx_init(r3, r4, r5, r6, r7);
183 ppc_md.setup_arch = ep405_setup_arch;
184 ppc_md.setup_io_mappings = ep405_map_io;
185 ppc_md.init_IRQ = ep405_init_IRQ;
187 ppc_md.nvram_read_val = todc_direct_read_val;
188 ppc_md.nvram_write_val = todc_direct_write_val;
190 if (__res.bi_nvramsize == 512*1024) {
191 ppc_md.time_init = todc_time_init;
192 ppc_md.set_rtc_time = todc_set_rtc_time;
193 ppc_md.get_rtc_time = todc_get_rtc_time;
195 printk("EP405: NVRTC size is not 512k (not a DS1557). Not sure what to do with it\n");