ast_post.c

  1/*
  2 * Copyright 2012 Red Hat Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the
  6 * "Software"), to deal in the Software without restriction, including
  7 * without limitation the rights to use, copy, modify, merge, publish,
  8 * distribute, sub license, and/or sell copies of the Software, and to
  9 * permit persons to whom the Software is furnished to do so, subject to
 10 * the following conditions:
 11 *
 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 18 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 19 *
 20 * The above copyright notice and this permission notice (including the
 21 * next paragraph) shall be included in all copies or substantial portions
 22 * of the Software.
 23 *
 24 */
 25/*
 26 * Authors: Dave Airlie <airlied@redhat.com>
 27 */
 28
 29#include <linux/delay.h>
 30#include <linux/pci.h>
 31
 32#include <drm/drm_print.h>
 33
 34#include "ast_drv.h"
 35#include "ast_post.h"
 36
 37u32 __ast_mindwm(void __iomem *regs, u32 r)
 38{
 39	u32 data;
 40
 41	__ast_write32(regs, 0xf004, r & 0xffff0000);
 42	__ast_write32(regs, 0xf000, 0x1);
 43
 44	do {
 45		data = __ast_read32(regs, 0xf004) & 0xffff0000;
 46	} while (data != (r & 0xffff0000));
 47
 48	return __ast_read32(regs, 0x10000 + (r & 0x0000ffff));
 49}
 50
 51void __ast_moutdwm(void __iomem *regs, u32 r, u32 v)
 52{
 53	u32 data;
 54
 55	__ast_write32(regs, 0xf004, r & 0xffff0000);
 56	__ast_write32(regs, 0xf000, 0x1);
 57
 58	do {
 59		data = __ast_read32(regs, 0xf004) & 0xffff0000;
 60	} while (data != (r & 0xffff0000));
 61
 62	__ast_write32(regs, 0x10000 + (r & 0x0000ffff), v);
 63}
 64
 65u32 ast_mindwm(struct ast_device *ast, u32 r)
 66{
 67	return __ast_mindwm(ast->regs, r);
 68}
 69
 70void ast_moutdwm(struct ast_device *ast, u32 r, u32 v)
 71{
 72	__ast_moutdwm(ast->regs, r, v);
 73}
 74
 75int ast_post_gpu(struct ast_device *ast)
 76{
 77	int ret;
 78
 79	if (AST_GEN(ast) >= 7) {
 80		ret = ast_2600_post(ast);
 81		if (ret)
 82			return ret;
 83	} else if (AST_GEN(ast) >= 6) {
 84		ret = ast_2500_post(ast);
 85		if (ret)
 86			return ret;
 87	} else if (AST_GEN(ast) >= 4) {
 88		ret = ast_2300_post(ast);
 89		if (ret)
 90			return ret;
 91	} else  if (AST_GEN(ast) >= 2) {
 92		ret = ast_2100_post(ast);
 93		if (ret)
 94			return ret;
 95	} else  {
 96		ret = ast_2000_post(ast);
 97		if (ret)
 98			return ret;
 99	}
100
101	return 0;
102}
103
104#define TIMEOUT              5000000
105
106bool mmc_test(struct ast_device *ast, u32 datagen, u8 test_ctl)
107{
108	u32 data, timeout;
109
110	ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
111	ast_moutdwm(ast, 0x1e6e0070, (datagen << 3) | test_ctl);
112	timeout = 0;
113	do {
114		data = ast_mindwm(ast, 0x1e6e0070) & 0x3000;
115		if (data & 0x2000)
116			return false;
117		if (++timeout > TIMEOUT) {
118			ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
119			return false;
120		}
121	} while (!data);
122	ast_moutdwm(ast, 0x1e6e0070, 0x0);
123	return true;
124}
125
126bool mmc_test_burst(struct ast_device *ast, u32 datagen)
127{
128	return mmc_test(ast, datagen, 0xc1);
129}