2 * MPC8610 HPCD board specific routines
4 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
5 * Recode: Jason Jin <jason.jin@freescale.com>
6 * York Sun <yorksun@freescale.com>
8 * Rewrite the interrupt routing. remove the 8259PIC support,
9 * All the integrated device in ULI use sideband interrupt.
11 * Copyright 2008 Freescale Semiconductor Inc.
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
19 #include <linux/stddef.h>
20 #include <linux/kernel.h>
21 #include <linux/pci.h>
22 #include <linux/kdev_t.h>
23 #include <linux/delay.h>
24 #include <linux/seq_file.h>
27 #include <asm/system.h>
29 #include <asm/machdep.h>
30 #include <asm/pci-bridge.h>
31 #include <asm/mpc86xx.h>
33 #include <mm/mmu_decl.h>
38 #include <linux/of_platform.h>
39 #include <sysdev/fsl_pci.h>
40 #include <sysdev/fsl_soc.h>
44 static unsigned char *pixis_bdcfg0, *pixis_arch;
46 static struct of_device_id __initdata mpc8610_ids[] = {
47 { .compatible = "fsl,mpc8610-immr", },
48 { .compatible = "simple-bus", },
49 { .compatible = "gianfar", },
53 static int __init mpc8610_declare_of_platform_devices(void)
55 /* Without this call, the SSI device driver won't get probed. */
56 of_platform_bus_probe(NULL, mpc8610_ids, NULL);
60 machine_device_initcall(mpc86xx_hpcd, mpc8610_declare_of_platform_devices);
62 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
64 static u32 get_busfreq(void)
66 struct device_node *node;
69 node = of_find_node_by_type(NULL, "cpu");
72 const unsigned int *prop =
73 of_get_property(node, "bus-frequency", &size);
81 unsigned int mpc8610hpcd_get_pixel_format(unsigned int bits_per_pixel,
84 static const unsigned long pixelformat[][3] = {
85 {0x88882317, 0x88083218, 0x65052119},
86 {0x88883316, 0x88082219, 0x65053118},
88 unsigned int pix_fmt, arch_monitor;
90 arch_monitor = ((*pixis_arch == 0x01) && (monitor_port == 0))? 0 : 1;
91 /* DVI port for board version 0x01 */
93 if (bits_per_pixel == 32)
94 pix_fmt = pixelformat[arch_monitor][0];
95 else if (bits_per_pixel == 24)
96 pix_fmt = pixelformat[arch_monitor][1];
97 else if (bits_per_pixel == 16)
98 pix_fmt = pixelformat[arch_monitor][2];
100 pix_fmt = pixelformat[1][0];
105 void mpc8610hpcd_set_gamma_table(int monitor_port, char *gamma_table_base)
108 if (monitor_port == 2) { /* dual link LVDS */
109 for (i = 0; i < 256*3; i++)
110 gamma_table_base[i] = (gamma_table_base[i] << 2) |
111 ((gamma_table_base[i] >> 6) & 0x03);
115 #define PX_BRDCFG0_DVISEL (1 << 3)
116 #define PX_BRDCFG0_DLINK (1 << 4)
117 #define PX_BRDCFG0_DIU_MASK (PX_BRDCFG0_DVISEL | PX_BRDCFG0_DLINK)
119 void mpc8610hpcd_set_monitor_port(int monitor_port)
121 static const u8 bdcfg[] = {
122 PX_BRDCFG0_DVISEL | PX_BRDCFG0_DLINK,
127 if (monitor_port < 3)
128 clrsetbits_8(pixis_bdcfg0, PX_BRDCFG0_DIU_MASK,
129 bdcfg[monitor_port]);
132 void mpc8610hpcd_set_pixel_clock(unsigned int pixclock)
134 u32 __iomem *clkdvdr;
136 /* variables for pixel clock calcs */
137 ulong bestval, bestfreq, speed_ccb, minpixclock, maxpixclock;
142 clkdvdr = ioremap(get_immrbase() + 0xe0800, sizeof(u32));
144 printk(KERN_ERR "Err: can't map clock divider register!\n");
148 /* Pixel Clock configuration */
149 pr_debug("DIU: Bus Frequency = %d\n", get_busfreq());
150 speed_ccb = get_busfreq();
152 /* Calculate the pixel clock with the smallest error */
153 /* calculate the following in steps to avoid overflow */
154 pr_debug("DIU pixclock in ps - %d\n", pixclock);
155 temp = 1000000000/pixclock;
158 pr_debug("DIU pixclock freq - %u\n", pixclock);
160 temp = pixclock * 5 / 100;
161 pr_debug("deviation = %d\n", temp);
162 minpixclock = pixclock - temp;
163 maxpixclock = pixclock + temp;
164 pr_debug("DIU minpixclock - %lu\n", minpixclock);
165 pr_debug("DIU maxpixclock - %lu\n", maxpixclock);
166 pixval = speed_ccb/pixclock;
167 pr_debug("DIU pixval = %lu\n", pixval);
171 pr_debug("DIU bestval = %lu\n", bestval);
174 for (i = -1; i <= 1; i++) {
175 temp = speed_ccb / ((pixval+i) + 1);
176 pr_debug("DIU test pixval i= %d, pixval=%lu, temp freq. = %u\n",
178 if ((temp < minpixclock) || (temp > maxpixclock))
179 pr_debug("DIU exceeds monitor range (%lu to %lu)\n",
180 minpixclock, maxpixclock);
181 else if (abs(temp - pixclock) < err) {
182 pr_debug("Entered the else if block %d\n", i);
183 err = abs(temp - pixclock);
189 pr_debug("DIU chose = %lx\n", bestval);
190 pr_debug("DIU error = %ld\n NomPixClk ", err);
191 pr_debug("DIU: Best Freq = %lx\n", bestfreq);
192 /* Modify PXCLK in GUTS CLKDVDR */
193 pr_debug("DIU: Current value of CLKDVDR = 0x%08x\n", (*clkdvdr));
194 temp = (*clkdvdr) & 0x2000FFFF;
195 *clkdvdr = temp; /* turn off clock */
196 *clkdvdr = temp | 0x80000000 | (((bestval) & 0x1F) << 16);
197 pr_debug("DIU: Modified value of CLKDVDR = 0x%08x\n", (*clkdvdr));
201 ssize_t mpc8610hpcd_show_monitor_port(int monitor_port, char *buf)
203 return snprintf(buf, PAGE_SIZE,
205 "%c1 - Single link LVDS\n"
206 "%c2 - Dual link LVDS\n",
207 monitor_port == 0 ? '*' : ' ',
208 monitor_port == 1 ? '*' : ' ',
209 monitor_port == 2 ? '*' : ' ');
212 int mpc8610hpcd_set_sysfs_monitor_port(int val)
214 return val < 3 ? val : 0;
219 static void __init mpc86xx_hpcd_setup_arch(void)
222 struct device_node *np;
223 unsigned char *pixis;
226 ppc_md.progress("mpc86xx_hpcd_setup_arch()", 0);
229 for_each_node_by_type(np, "pci") {
230 if (of_device_is_compatible(np, "fsl,mpc8610-pci")
231 || of_device_is_compatible(np, "fsl,mpc8641-pcie")) {
232 struct resource rsrc;
233 of_address_to_resource(np, 0, &rsrc);
234 if ((rsrc.start & 0xfffff) == 0xa000)
235 fsl_add_bridge(np, 1);
237 fsl_add_bridge(np, 0);
241 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
242 diu_ops.get_pixel_format = mpc8610hpcd_get_pixel_format;
243 diu_ops.set_gamma_table = mpc8610hpcd_set_gamma_table;
244 diu_ops.set_monitor_port = mpc8610hpcd_set_monitor_port;
245 diu_ops.set_pixel_clock = mpc8610hpcd_set_pixel_clock;
246 diu_ops.show_monitor_port = mpc8610hpcd_show_monitor_port;
247 diu_ops.set_sysfs_monitor_port = mpc8610hpcd_set_sysfs_monitor_port;
250 np = of_find_compatible_node(NULL, NULL, "fsl,fpga-pixis");
252 of_address_to_resource(np, 0, &r);
254 pixis = ioremap(r.start, 32);
256 printk(KERN_ERR "Err: can't map FPGA cfg register!\n");
259 pixis_bdcfg0 = pixis + 8;
260 pixis_arch = pixis + 1;
262 printk(KERN_ERR "Err: "
263 "can't find device node 'fsl,fpga-pixis'\n");
265 printk("MPC86xx HPCD board from Freescale Semiconductor\n");
269 * Called very early, device-tree isn't unflattened
271 static int __init mpc86xx_hpcd_probe(void)
273 unsigned long root = of_get_flat_dt_root();
275 if (of_flat_dt_is_compatible(root, "fsl,MPC8610HPCD"))
276 return 1; /* Looks good */
281 static long __init mpc86xx_time_init(void)
285 /* Set the time base to zero */
289 temp = mfspr(SPRN_HID0);
291 mtspr(SPRN_HID0, temp);
292 asm volatile("isync");
297 define_machine(mpc86xx_hpcd) {
298 .name = "MPC86xx HPCD",
299 .probe = mpc86xx_hpcd_probe,
300 .setup_arch = mpc86xx_hpcd_setup_arch,
301 .init_IRQ = mpc86xx_init_irq,
302 .get_irq = mpic_get_irq,
303 .restart = fsl_rstcr_restart,
304 .time_init = mpc86xx_time_init,
305 .calibrate_decr = generic_calibrate_decr,
306 .progress = udbg_progress,
307 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,