2 * cx18 driver PCI memory mapped IO access routines
4 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
5 * Copyright (C) 2008 Andy Walls <awalls@radix.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 #include "cx18-driver.h"
27 void cx18_log_statistics(struct cx18 *cx)
31 if (!(cx18_debug & CX18_DBGFLG_INFO))
34 for (i = 0; i <= CX18_MAX_MMIO_RETRIES; i++)
35 CX18_DEBUG_INFO("retried_write[%d] = %d\n", i,
36 atomic_read(&cx->mmio_stats.retried_write[i]));
37 for (i = 0; i <= CX18_MAX_MMIO_RETRIES; i++)
38 CX18_DEBUG_INFO("retried_read[%d] = %d\n", i,
39 atomic_read(&cx->mmio_stats.retried_read[i]));
43 void cx18_raw_writel_retry(struct cx18 *cx, u32 val, void __iomem *addr)
46 for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
47 cx18_raw_writel_noretry(cx, val, addr);
48 if (val == cx18_raw_readl_noretry(cx, addr))
51 cx18_log_write_retries(cx, i, addr);
54 u32 cx18_raw_readl_retry(struct cx18 *cx, const void __iomem *addr)
58 for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
59 val = cx18_raw_readl_noretry(cx, addr);
60 if (val != 0xffffffff) /* PCI bus read error */
63 cx18_log_read_retries(cx, i, addr);
67 u16 cx18_raw_readw_retry(struct cx18 *cx, const void __iomem *addr)
71 for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
72 val = cx18_raw_readw_noretry(cx, addr);
73 if (val != 0xffff) /* PCI bus read error */
76 cx18_log_read_retries(cx, i, addr);
80 void cx18_writel_retry(struct cx18 *cx, u32 val, void __iomem *addr)
83 for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
84 cx18_writel_noretry(cx, val, addr);
85 if (val == cx18_readl_noretry(cx, addr))
88 cx18_log_write_retries(cx, i, addr);
91 void _cx18_writel_expect(struct cx18 *cx, u32 val, void __iomem *addr,
96 for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
97 cx18_writel_noretry(cx, val, addr);
98 if (eval == (cx18_readl_noretry(cx, addr) & mask))
101 cx18_log_write_retries(cx, i, addr);
104 void cx18_writew_retry(struct cx18 *cx, u16 val, void __iomem *addr)
107 for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
108 cx18_writew_noretry(cx, val, addr);
109 if (val == cx18_readw_noretry(cx, addr))
112 cx18_log_write_retries(cx, i, addr);
115 void cx18_writeb_retry(struct cx18 *cx, u8 val, void __iomem *addr)
118 for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
119 cx18_writeb_noretry(cx, val, addr);
120 if (val == cx18_readb_noretry(cx, addr))
123 cx18_log_write_retries(cx, i, addr);
126 u32 cx18_readl_retry(struct cx18 *cx, const void __iomem *addr)
130 for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
131 val = cx18_readl_noretry(cx, addr);
132 if (val != 0xffffffff) /* PCI bus read error */
135 cx18_log_read_retries(cx, i, addr);
139 u16 cx18_readw_retry(struct cx18 *cx, const void __iomem *addr)
143 for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
144 val = cx18_readw_noretry(cx, addr);
145 if (val != 0xffff) /* PCI bus read error */
148 cx18_log_read_retries(cx, i, addr);
152 u8 cx18_readb_retry(struct cx18 *cx, const void __iomem *addr)
156 for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
157 val = cx18_readb_noretry(cx, addr);
158 if (val != 0xff) /* PCI bus read error */
161 cx18_log_read_retries(cx, i, addr);
165 void cx18_memcpy_fromio(struct cx18 *cx, void *to,
166 const void __iomem *from, unsigned int len)
168 const u8 __iomem *src = from;
171 /* Align reads on the CX23418's addresses */
172 if ((len > 0) && ((unsigned long) src & 1)) {
173 *dst = cx18_readb(cx, src);
178 if ((len > 1) && ((unsigned long) src & 2)) {
179 *((u16 *)dst) = cx18_raw_readw(cx, src);
185 *((u32 *)dst) = cx18_raw_readl(cx, src);
191 *((u16 *)dst) = cx18_raw_readw(cx, src);
197 *dst = cx18_readb(cx, src);
200 void cx18_memset_io(struct cx18 *cx, void __iomem *addr, int val, size_t count)
202 u8 __iomem *dst = addr;
203 u16 val2 = val | (val << 8);
204 u32 val4 = val2 | (val2 << 16);
206 /* Align writes on the CX23418's addresses */
207 if ((count > 0) && ((unsigned long)dst & 1)) {
208 cx18_writeb(cx, (u8) val, dst);
212 if ((count > 1) && ((unsigned long)dst & 2)) {
213 cx18_writew(cx, val2, dst);
218 cx18_writel(cx, val4, dst);
223 cx18_writew(cx, val2, dst);
228 cx18_writeb(cx, (u8) val, dst);
231 void cx18_sw1_irq_enable(struct cx18 *cx, u32 val)
234 cx18_write_reg_expect(cx, val, SW1_INT_STATUS, ~val, val);
235 r = cx18_read_reg(cx, SW1_INT_ENABLE_PCI);
236 cx18_write_reg(cx, r | val, SW1_INT_ENABLE_PCI);
239 void cx18_sw1_irq_disable(struct cx18 *cx, u32 val)
242 r = cx18_read_reg(cx, SW1_INT_ENABLE_PCI);
243 cx18_write_reg(cx, r & ~val, SW1_INT_ENABLE_PCI);
246 void cx18_sw2_irq_enable(struct cx18 *cx, u32 val)
249 cx18_write_reg_expect(cx, val, SW2_INT_STATUS, ~val, val);
250 r = cx18_read_reg(cx, SW2_INT_ENABLE_PCI);
251 cx18_write_reg(cx, r | val, SW2_INT_ENABLE_PCI);
254 void cx18_sw2_irq_disable(struct cx18 *cx, u32 val)
257 r = cx18_read_reg(cx, SW2_INT_ENABLE_PCI);
258 cx18_write_reg(cx, r & ~val, SW2_INT_ENABLE_PCI);
261 void cx18_setup_page(struct cx18 *cx, u32 addr)
264 val = cx18_read_reg(cx, 0xD000F8);
265 val = (val & ~0x1f00) | ((addr >> 17) & 0x1f00);
266 cx18_write_reg(cx, val, 0xD000F8);