1 /*
2 * MPC8610 HPCD board specific routines
3 *
4 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
5 * Recode: Jason Jin <jason.jin@freescale.com>
6 * York Sun <yorksun@freescale.com>
7 *
8 * Rewrite the interrupt routing. remove the 8259PIC support,
9 * All the integrated device in ULI use sideband interrupt.
10 *
11 * Copyright 2008 Freescale Semiconductor Inc.
12 *
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.
17 */
18
19 #include <linux/stddef.h>
20 #include <linux/kernel.h>
21 #include <linux/pci.h>
22 #include <linux/interrupt.h>
23 #include <linux/kdev_t.h>
24 #include <linux/delay.h>
25 #include <linux/seq_file.h>
26 #include <linux/of.h>
27
28 #include <asm/time.h>
29 #include <asm/machdep.h>
30 #include <asm/pci-bridge.h>
31 #include <asm/prom.h>
32 #include <mm/mmu_decl.h>
33 #include <asm/udbg.h>
34
35 #include <asm/mpic.h>
36
37 #include <linux/of_platform.h>
38 #include <sysdev/fsl_pci.h>
39 #include <sysdev/fsl_soc.h>
40 #include <sysdev/simple_gpio.h>
41 #include <asm/fsl_guts.h>
42
43 #include "mpc86xx.h"
44
45 static struct device_node *pixis_node;
46 static unsigned char *pixis_bdcfg0, *pixis_arch;
47
48 /* DIU Pixel Clock bits of the CLKDVDR Global Utilities register */
49 #define CLKDVDR_PXCKEN 0x80000000
50 #define CLKDVDR_PXCKINV 0x10000000
51 #define CLKDVDR_PXCKDLY 0x06000000
52 #define CLKDVDR_PXCLK_MASK 0x001F0000
53
54 #ifdef CONFIG_SUSPEND
mpc8610_sw9_irq(int irq,void * data)55 static irqreturn_t mpc8610_sw9_irq(int irq, void *data)
56 {
57 pr_debug("%s: PIXIS' event (sw9/wakeup) IRQ handled\n", __func__);
58 return IRQ_HANDLED;
59 }
60
mpc8610_suspend_init(void)61 static void __init mpc8610_suspend_init(void)
62 {
63 int irq;
64 int ret;
65
66 if (!pixis_node)
67 return;
68
69 irq = irq_of_parse_and_map(pixis_node, 0);
70 if (!irq) {
71 pr_err("%s: can't map pixis event IRQ.\n", __func__);
72 return;
73 }
74
75 ret = request_irq(irq, mpc8610_sw9_irq, 0, "sw9:wakeup", NULL);
76 if (ret) {
77 pr_err("%s: can't request pixis event IRQ: %d\n",
78 __func__, ret);
79 irq_dispose_mapping(irq);
80 }
81
82 enable_irq_wake(irq);
83 }
84 #else
mpc8610_suspend_init(void)85 static inline void mpc8610_suspend_init(void) { }
86 #endif /* CONFIG_SUSPEND */
87
88 static struct of_device_id __initdata mpc8610_ids[] = {
89 { .compatible = "fsl,mpc8610-immr", },
90 { .compatible = "fsl,mpc8610-guts", },
91 { .compatible = "simple-bus", },
92 /* So that the DMA channel nodes can be probed individually: */
93 { .compatible = "fsl,eloplus-dma", },
94 {}
95 };
96
mpc8610_declare_of_platform_devices(void)97 static int __init mpc8610_declare_of_platform_devices(void)
98 {
99 /* Firstly, register PIXIS GPIOs. */
100 simple_gpiochip_init("fsl,fpga-pixis-gpio-bank");
101
102 /* Enable wakeup on PIXIS' event IRQ. */
103 mpc8610_suspend_init();
104
105 /* Without this call, the SSI device driver won't get probed. */
106 of_platform_bus_probe(NULL, mpc8610_ids, NULL);
107
108 return 0;
109 }
110 machine_device_initcall(mpc86xx_hpcd, mpc8610_declare_of_platform_devices);
111
112 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
113
114 /*
115 * DIU Area Descriptor
116 *
117 * The MPC8610 reference manual shows the bits of the AD register in
118 * little-endian order, which causes the BLUE_C field to be split into two
119 * parts. To simplify the definition of the MAKE_AD() macro, we define the
120 * fields in big-endian order and byte-swap the result.
121 *
122 * So even though the registers don't look like they're in the
123 * same bit positions as they are on the P1022, the same value is written to
124 * the AD register on the MPC8610 and on the P1022.
125 */
126 #define AD_BYTE_F 0x10000000
127 #define AD_ALPHA_C_MASK 0x0E000000
128 #define AD_ALPHA_C_SHIFT 25
129 #define AD_BLUE_C_MASK 0x01800000
130 #define AD_BLUE_C_SHIFT 23
131 #define AD_GREEN_C_MASK 0x00600000
132 #define AD_GREEN_C_SHIFT 21
133 #define AD_RED_C_MASK 0x00180000
134 #define AD_RED_C_SHIFT 19
135 #define AD_PALETTE 0x00040000
136 #define AD_PIXEL_S_MASK 0x00030000
137 #define AD_PIXEL_S_SHIFT 16
138 #define AD_COMP_3_MASK 0x0000F000
139 #define AD_COMP_3_SHIFT 12
140 #define AD_COMP_2_MASK 0x00000F00
141 #define AD_COMP_2_SHIFT 8
142 #define AD_COMP_1_MASK 0x000000F0
143 #define AD_COMP_1_SHIFT 4
144 #define AD_COMP_0_MASK 0x0000000F
145 #define AD_COMP_0_SHIFT 0
146
147 #define MAKE_AD(alpha, red, blue, green, size, c0, c1, c2, c3) \
148 cpu_to_le32(AD_BYTE_F | (alpha << AD_ALPHA_C_SHIFT) | \
149 (blue << AD_BLUE_C_SHIFT) | (green << AD_GREEN_C_SHIFT) | \
150 (red << AD_RED_C_SHIFT) | (c3 << AD_COMP_3_SHIFT) | \
151 (c2 << AD_COMP_2_SHIFT) | (c1 << AD_COMP_1_SHIFT) | \
152 (c0 << AD_COMP_0_SHIFT) | (size << AD_PIXEL_S_SHIFT))
153
mpc8610hpcd_get_pixel_format(enum fsl_diu_monitor_port port,unsigned int bits_per_pixel)154 u32 mpc8610hpcd_get_pixel_format(enum fsl_diu_monitor_port port,
155 unsigned int bits_per_pixel)
156 {
157 static const u32 pixelformat[][3] = {
158 {
159 MAKE_AD(3, 0, 2, 1, 3, 8, 8, 8, 8),
160 MAKE_AD(4, 2, 0, 1, 2, 8, 8, 8, 0),
161 MAKE_AD(4, 0, 2, 1, 1, 5, 6, 5, 0)
162 },
163 {
164 MAKE_AD(3, 2, 0, 1, 3, 8, 8, 8, 8),
165 MAKE_AD(4, 0, 2, 1, 2, 8, 8, 8, 0),
166 MAKE_AD(4, 2, 0, 1, 1, 5, 6, 5, 0)
167 },
168 };
169 unsigned int arch_monitor;
170
171 /* The DVI port is mis-wired on revision 1 of this board. */
172 arch_monitor =
173 ((*pixis_arch == 0x01) && (port == FSL_DIU_PORT_DVI)) ? 0 : 1;
174
175 switch (bits_per_pixel) {
176 case 32:
177 return pixelformat[arch_monitor][0];
178 case 24:
179 return pixelformat[arch_monitor][1];
180 case 16:
181 return pixelformat[arch_monitor][2];
182 default:
183 pr_err("fsl-diu: unsupported pixel depth %u\n", bits_per_pixel);
184 return 0;
185 }
186 }
187
mpc8610hpcd_set_gamma_table(enum fsl_diu_monitor_port port,char * gamma_table_base)188 void mpc8610hpcd_set_gamma_table(enum fsl_diu_monitor_port port,
189 char *gamma_table_base)
190 {
191 int i;
192 if (port == FSL_DIU_PORT_DLVDS) {
193 for (i = 0; i < 256*3; i++)
194 gamma_table_base[i] = (gamma_table_base[i] << 2) |
195 ((gamma_table_base[i] >> 6) & 0x03);
196 }
197 }
198
199 #define PX_BRDCFG0_DVISEL (1 << 3)
200 #define PX_BRDCFG0_DLINK (1 << 4)
201 #define PX_BRDCFG0_DIU_MASK (PX_BRDCFG0_DVISEL | PX_BRDCFG0_DLINK)
202
mpc8610hpcd_set_monitor_port(enum fsl_diu_monitor_port port)203 void mpc8610hpcd_set_monitor_port(enum fsl_diu_monitor_port port)
204 {
205 switch (port) {
206 case FSL_DIU_PORT_DVI:
207 clrsetbits_8(pixis_bdcfg0, PX_BRDCFG0_DIU_MASK,
208 PX_BRDCFG0_DVISEL | PX_BRDCFG0_DLINK);
209 break;
210 case FSL_DIU_PORT_LVDS:
211 clrsetbits_8(pixis_bdcfg0, PX_BRDCFG0_DIU_MASK,
212 PX_BRDCFG0_DLINK);
213 break;
214 case FSL_DIU_PORT_DLVDS:
215 clrbits8(pixis_bdcfg0, PX_BRDCFG0_DIU_MASK);
216 break;
217 }
218 }
219
220 /**
221 * mpc8610hpcd_set_pixel_clock: program the DIU's clock
222 *
223 * @pixclock: the wavelength, in picoseconds, of the clock
224 */
mpc8610hpcd_set_pixel_clock(unsigned int pixclock)225 void mpc8610hpcd_set_pixel_clock(unsigned int pixclock)
226 {
227 struct device_node *guts_np = NULL;
228 struct ccsr_guts __iomem *guts;
229 unsigned long freq;
230 u64 temp;
231 u32 pxclk;
232
233 /* Map the global utilities registers. */
234 guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts");
235 if (!guts_np) {
236 pr_err("mpc8610hpcd: missing global utilties device node\n");
237 return;
238 }
239
240 guts = of_iomap(guts_np, 0);
241 of_node_put(guts_np);
242 if (!guts) {
243 pr_err("mpc8610hpcd: could not map global utilties device\n");
244 return;
245 }
246
247 /* Convert pixclock from a wavelength to a frequency */
248 temp = 1000000000000ULL;
249 do_div(temp, pixclock);
250 freq = temp;
251
252 /*
253 * 'pxclk' is the ratio of the platform clock to the pixel clock.
254 * On the MPC8610, the value programmed into CLKDVDR is the ratio
255 * minus one. The valid range of values is 2-31.
256 */
257 pxclk = DIV_ROUND_CLOSEST(fsl_get_sys_freq(), freq) - 1;
258 pxclk = clamp_t(u32, pxclk, 2, 31);
259
260 /* Disable the pixel clock, and set it to non-inverted and no delay */
261 clrbits32(&guts->clkdvdr,
262 CLKDVDR_PXCKEN | CLKDVDR_PXCKDLY | CLKDVDR_PXCLK_MASK);
263
264 /* Enable the clock and set the pxclk */
265 setbits32(&guts->clkdvdr, CLKDVDR_PXCKEN | (pxclk << 16));
266
267 iounmap(guts);
268 }
269
270 enum fsl_diu_monitor_port
mpc8610hpcd_valid_monitor_port(enum fsl_diu_monitor_port port)271 mpc8610hpcd_valid_monitor_port(enum fsl_diu_monitor_port port)
272 {
273 return port;
274 }
275
276 #endif
277
mpc86xx_hpcd_setup_arch(void)278 static void __init mpc86xx_hpcd_setup_arch(void)
279 {
280 struct resource r;
281 struct device_node *np;
282 unsigned char *pixis;
283
284 if (ppc_md.progress)
285 ppc_md.progress("mpc86xx_hpcd_setup_arch()", 0);
286
287 #ifdef CONFIG_PCI
288 for_each_node_by_type(np, "pci") {
289 if (of_device_is_compatible(np, "fsl,mpc8610-pci")
290 || of_device_is_compatible(np, "fsl,mpc8641-pcie")) {
291 struct resource rsrc;
292 of_address_to_resource(np, 0, &rsrc);
293 if ((rsrc.start & 0xfffff) == 0xa000)
294 fsl_add_bridge(np, 1);
295 else
296 fsl_add_bridge(np, 0);
297 }
298 }
299 #endif
300 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
301 diu_ops.get_pixel_format = mpc8610hpcd_get_pixel_format;
302 diu_ops.set_gamma_table = mpc8610hpcd_set_gamma_table;
303 diu_ops.set_monitor_port = mpc8610hpcd_set_monitor_port;
304 diu_ops.set_pixel_clock = mpc8610hpcd_set_pixel_clock;
305 diu_ops.valid_monitor_port = mpc8610hpcd_valid_monitor_port;
306 #endif
307
308 pixis_node = of_find_compatible_node(NULL, NULL, "fsl,fpga-pixis");
309 if (pixis_node) {
310 of_address_to_resource(pixis_node, 0, &r);
311 of_node_put(pixis_node);
312 pixis = ioremap(r.start, 32);
313 if (!pixis) {
314 printk(KERN_ERR "Err: can't map FPGA cfg register!\n");
315 return;
316 }
317 pixis_bdcfg0 = pixis + 8;
318 pixis_arch = pixis + 1;
319 } else
320 printk(KERN_ERR "Err: "
321 "can't find device node 'fsl,fpga-pixis'\n");
322
323 printk("MPC86xx HPCD board from Freescale Semiconductor\n");
324 }
325
326 /*
327 * Called very early, device-tree isn't unflattened
328 */
mpc86xx_hpcd_probe(void)329 static int __init mpc86xx_hpcd_probe(void)
330 {
331 unsigned long root = of_get_flat_dt_root();
332
333 if (of_flat_dt_is_compatible(root, "fsl,MPC8610HPCD"))
334 return 1; /* Looks good */
335
336 return 0;
337 }
338
mpc86xx_time_init(void)339 static long __init mpc86xx_time_init(void)
340 {
341 unsigned int temp;
342
343 /* Set the time base to zero */
344 mtspr(SPRN_TBWL, 0);
345 mtspr(SPRN_TBWU, 0);
346
347 temp = mfspr(SPRN_HID0);
348 temp |= HID0_TBEN;
349 mtspr(SPRN_HID0, temp);
350 asm volatile("isync");
351
352 return 0;
353 }
354
define_machine(mpc86xx_hpcd)355 define_machine(mpc86xx_hpcd) {
356 .name = "MPC86xx HPCD",
357 .probe = mpc86xx_hpcd_probe,
358 .setup_arch = mpc86xx_hpcd_setup_arch,
359 .init_IRQ = mpc86xx_init_irq,
360 .get_irq = mpic_get_irq,
361 .restart = fsl_rstcr_restart,
362 .time_init = mpc86xx_time_init,
363 .calibrate_decr = generic_calibrate_decr,
364 .progress = udbg_progress,
365 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
366 };
367