2 * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/slab.h>
13 #include <linux/dma-mapping.h>
14 #include <linux/irq.h>
15 #include <linux/interrupt.h>
16 #include <linux/bootmem.h>
17 #include <asm/cacheflush.h>
18 #include <linux/platform_device.h>
19 #include <linux/clk.h>
23 #include "rk_nand_blk.h"
24 #include "rk_ftl_api.h"
26 #define RKNAND_VERSION_AND_DATE "rknandbase v1.1 2016-01-08"
28 struct rk_nandc_info {
30 void __iomem *reg_base;
33 struct clk *clk; /* flash clk*/
34 struct clk *hclk; /* nandc clk*/
37 static struct rk_nandc_info g_nandc_info[2];
38 struct device *g_nand_device;
39 static char nand_idb_data[2048];
40 static int rk_nand_wait_busy_schedule;
41 static int rk_nand_suspend_state;
42 static int rk_nand_shutdown_state;
43 /*1:flash 2:emmc 4:sdcard0 8:sdcard1*/
44 static int rknand_boot_media = 2;
45 static DECLARE_WAIT_QUEUE_HEAD(rk29_nandc_wait);
46 static void rk_nand_iqr_timeout_hack(unsigned long data);
47 static DEFINE_TIMER(rk_nand_iqr_timeout, rk_nand_iqr_timeout_hack, 0, 0);
48 static int nandc0_xfer_completed_flag;
49 static int nandc0_ready_completed_flag;
50 static int nandc1_xfer_completed_flag;
51 static int nandc1_ready_completed_flag;
52 static int rk_timer_add;
54 char rknand_get_sn(char *pbuf)
56 memcpy(pbuf, &nand_idb_data[0x600], 0x200);
60 char rknand_get_vendor0(char *pbuf)
62 memcpy(pbuf, &nand_idb_data[0x400 + 8], 504);
66 char *rknand_get_idb_data(void)
70 EXPORT_SYMBOL(rknand_get_idb_data);
72 int rknand_get_clk_rate(int nandc_id)
74 return g_nandc_info[nandc_id].clk_rate;
76 EXPORT_SYMBOL(rknand_get_clk_rate);
78 unsigned long rknand_dma_flush_dcache(unsigned long ptr, int size, int dir)
81 __flush_dcache_area((void *)ptr, size + 63);
83 __cpuc_flush_dcache_area((void *)ptr, size + 63);
85 return ((unsigned long)virt_to_phys((void *)ptr));
87 EXPORT_SYMBOL(rknand_dma_flush_dcache);
89 unsigned long rknand_dma_map_single(unsigned long ptr, int size, int dir)
92 __dma_map_area((void *)ptr, size, dir);
93 return ((unsigned long)virt_to_phys((void *)ptr));
95 return dma_map_single(NULL, (void *)ptr, size
96 , dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
99 EXPORT_SYMBOL(rknand_dma_map_single);
101 void rknand_dma_unmap_single(unsigned long ptr, int size, int dir)
104 __dma_unmap_area(phys_to_virt(ptr), size, dir);
106 dma_unmap_single(NULL, (dma_addr_t)ptr, size
107 , dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
110 EXPORT_SYMBOL(rknand_dma_unmap_single);
112 int rknand_flash_cs_init(int id)
116 EXPORT_SYMBOL(rknand_flash_cs_init);
118 int rknand_get_reg_addr(unsigned long *p_nandc0, unsigned long *p_nandc1)
120 *p_nandc0 = (unsigned long)g_nandc_info[0].reg_base;
121 *p_nandc1 = (unsigned long)g_nandc_info[1].reg_base;
124 EXPORT_SYMBOL(rknand_get_reg_addr);
126 int rknand_get_boot_media(void)
128 return rknand_boot_media;
130 EXPORT_SYMBOL(rknand_get_boot_media);
132 int rk_nand_schedule_enable_config(int en)
134 int tmp = rk_nand_wait_busy_schedule;
136 rk_nand_wait_busy_schedule = en;
140 static void rk_nand_iqr_timeout_hack(unsigned long data)
142 del_timer(&rk_nand_iqr_timeout);
144 nandc0_xfer_completed_flag = 1;
145 nandc0_ready_completed_flag = 1;
146 nandc1_xfer_completed_flag = 1;
147 nandc1_ready_completed_flag = 1;
148 wake_up(&rk29_nandc_wait);
151 static void rk_add_timer(void)
153 if (rk_timer_add == 0) {
155 rk_nand_iqr_timeout.expires = jiffies + HZ / 50;
156 add_timer(&rk_nand_iqr_timeout);
160 static void rk_del_timer(void)
163 del_timer(&rk_nand_iqr_timeout);
167 static irqreturn_t rk_nandc_interrupt(int irq, void *dev_id)
169 unsigned int irq_status = rk_nandc_get_irq_status(dev_id);
171 if (irq_status & (1 << 0)) {
172 rk_nandc_flash_xfer_completed(dev_id);
173 if (dev_id == g_nandc_info[0].reg_base)
174 nandc0_xfer_completed_flag = 1;
176 nandc1_xfer_completed_flag = 1;
179 if (irq_status & (1 << 1)) {
180 rk_nandc_flash_ready(dev_id);
181 if (dev_id == g_nandc_info[0].reg_base)
182 nandc0_ready_completed_flag = 1;
184 nandc1_ready_completed_flag = 1;
187 wake_up(&rk29_nandc_wait);
191 void rk_nandc_xfer_irq_flag_init(void *nandc_reg)
193 if (nandc_reg == g_nandc_info[0].reg_base)
194 nandc0_xfer_completed_flag = 0;
196 nandc1_xfer_completed_flag = 0;
199 void rk_nandc_rb_irq_flag_init(void *nandc_reg)
201 if (nandc_reg == g_nandc_info[0].reg_base)
202 nandc0_ready_completed_flag = 0;
204 nandc1_ready_completed_flag = 0;
207 void wait_for_nandc_xfer_completed(void *nandc_reg)
209 if (rk_nand_wait_busy_schedule) {
211 if (nandc_reg == g_nandc_info[0].reg_base)
212 wait_event(rk29_nandc_wait, nandc0_xfer_completed_flag);
214 wait_event(rk29_nandc_wait, nandc1_xfer_completed_flag);
217 if (nandc_reg == g_nandc_info[0].reg_base)
218 nandc0_xfer_completed_flag = 0;
220 nandc1_xfer_completed_flag = 0;
223 void wait_for_nand_flash_ready(void *nandc_reg)
225 if (rk_nand_wait_busy_schedule) {
227 if (nandc_reg == g_nandc_info[0].reg_base)
228 wait_event(rk29_nandc_wait
229 , nandc0_ready_completed_flag);
231 wait_event(rk29_nandc_wait
232 , nandc1_ready_completed_flag);
235 if (nandc_reg == g_nandc_info[0].reg_base)
236 nandc0_ready_completed_flag = 0;
238 nandc1_ready_completed_flag = 0;
241 static int rk_nandc_irq_config(int id, int mode, void *pfun)
244 int irq = g_nandc_info[id].irq;
247 ret = request_irq(irq, pfun, 0, "nandc"
248 , g_nandc_info[id].reg_base);
254 int rk_nandc_irq_init(void)
259 nandc0_ready_completed_flag = 0;
260 nandc0_xfer_completed_flag = 0;
261 rk_nandc_irq_config(0, 1, rk_nandc_interrupt);
263 if (g_nandc_info[1].reg_base != 0) {
264 nandc1_ready_completed_flag = 0;
265 nandc1_xfer_completed_flag = 0;
266 rk_nandc_irq_config(1, 1, rk_nandc_interrupt);
271 int rk_nandc_irq_deinit(void)
275 rk_nandc_irq_config(0, 0, rk_nandc_interrupt);
276 if (g_nandc_info[1].reg_base != 0)
277 rk_nandc_irq_config(1, 0, rk_nandc_interrupt);
281 static int rknand_probe(struct platform_device *pdev)
285 struct resource *mem;
286 void __iomem *membase;
288 g_nand_device = &pdev->dev;
289 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
290 membase = devm_ioremap_resource(&pdev->dev, mem);
292 dev_err(&pdev->dev, "no reg resource?\n");
297 of_property_read_u32(pdev->dev.of_node, "nandc_id", &id);
302 memcpy(nand_idb_data, membase + 0x1000, 0x800);
303 if (*(int *)(&nand_idb_data[0]) == 0x44535953) {
304 rknand_boot_media = *(int *)(&nand_idb_data[8]);
305 if (rknand_boot_media == 2) /*boot from emmc*/
310 irq = platform_get_irq(pdev, 0);
312 dev_err(&pdev->dev, "no irq resource?\n");
316 g_nandc_info[id].id = id;
317 g_nandc_info[id].irq = irq;
318 g_nandc_info[id].reg_base = membase;
320 g_nandc_info[id].hclk = devm_clk_get(&pdev->dev, "hclk_nandc");
321 g_nandc_info[id].clk = devm_clk_get(&pdev->dev, "clk_nandc");
323 if (unlikely(IS_ERR(g_nandc_info[id].clk)) ||
324 unlikely(IS_ERR(g_nandc_info[id].hclk))) {
325 dev_err(&pdev->dev, "rknand_probe get clk error\n");
329 clk_set_rate(g_nandc_info[id].clk, 150 * 1000 * 1000);
330 g_nandc_info[id].clk_rate = clk_get_rate(g_nandc_info[id].clk);
331 clk_prepare_enable(g_nandc_info[id].clk);
332 clk_prepare_enable(g_nandc_info[id].hclk);
335 "rknand_probe clk rate = %d\n",
336 g_nandc_info[id].clk_rate);
340 static int rknand_suspend(struct platform_device *pdev, pm_message_t state)
342 if (rk_nand_suspend_state == 0) {
343 rk_nand_suspend_state = 1;
344 rknand_dev_suspend();
349 static int rknand_resume(struct platform_device *pdev)
351 if (rk_nand_suspend_state == 1) {
352 rk_nand_suspend_state = 0;
358 static void rknand_shutdown(struct platform_device *pdev)
360 if (rk_nand_shutdown_state == 0) {
361 rk_nand_shutdown_state = 1;
362 rknand_dev_shutdown();
366 void rknand_dev_cache_flush(void)
372 static const struct of_device_id of_rk_nandc_match[] = {
373 {.compatible = "rockchip,rk-nandc"},
378 static struct platform_driver rknand_driver = {
379 .probe = rknand_probe,
380 .suspend = rknand_suspend,
381 .resume = rknand_resume,
382 .shutdown = rknand_shutdown,
386 .of_match_table = of_rk_nandc_match,
388 .owner = THIS_MODULE,
392 static void __exit rknand_driver_exit(void)
395 platform_driver_unregister(&rknand_driver);
398 static int __init rknand_driver_init(void)
402 pr_err("%s\n", RKNAND_VERSION_AND_DATE);
403 ret = platform_driver_register(&rknand_driver);
405 ret = rknand_dev_init();
409 module_init(rknand_driver_init);
410 module_exit(rknand_driver_exit);
411 MODULE_ALIAS(DRIVER_NAME);