This source file includes following definitions.
- jazz_esp_write8
- jazz_esp_read8
- jazz_esp_irq_pending
- jazz_esp_reset_dma
- jazz_esp_dma_drain
- jazz_esp_dma_invalidate
- jazz_esp_send_dma_cmd
- jazz_esp_dma_error
- esp_jazz_probe
- esp_jazz_remove
- jazz_esp_init
- jazz_esp_exit
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7 #include <linux/kernel.h>
8 #include <linux/gfp.h>
9 #include <linux/types.h>
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/interrupt.h>
13 #include <linux/platform_device.h>
14 #include <linux/dma-mapping.h>
15
16 #include <asm/irq.h>
17 #include <asm/io.h>
18 #include <asm/dma.h>
19
20 #include <asm/jazz.h>
21 #include <asm/jazzdma.h>
22
23 #include <scsi/scsi_host.h>
24
25 #include "esp_scsi.h"
26
27 #define DRV_MODULE_NAME "jazz_esp"
28 #define PFX DRV_MODULE_NAME ": "
29 #define DRV_VERSION "1.000"
30 #define DRV_MODULE_RELDATE "May 19, 2007"
31
32 static void jazz_esp_write8(struct esp *esp, u8 val, unsigned long reg)
33 {
34 *(volatile u8 *)(esp->regs + reg) = val;
35 }
36
37 static u8 jazz_esp_read8(struct esp *esp, unsigned long reg)
38 {
39 return *(volatile u8 *)(esp->regs + reg);
40 }
41
42 static int jazz_esp_irq_pending(struct esp *esp)
43 {
44 if (jazz_esp_read8(esp, ESP_STATUS) & ESP_STAT_INTR)
45 return 1;
46 return 0;
47 }
48
49 static void jazz_esp_reset_dma(struct esp *esp)
50 {
51 vdma_disable ((int)esp->dma_regs);
52 }
53
54 static void jazz_esp_dma_drain(struct esp *esp)
55 {
56
57 }
58
59 static void jazz_esp_dma_invalidate(struct esp *esp)
60 {
61 vdma_disable ((int)esp->dma_regs);
62 }
63
64 static void jazz_esp_send_dma_cmd(struct esp *esp, u32 addr, u32 esp_count,
65 u32 dma_count, int write, u8 cmd)
66 {
67 BUG_ON(!(cmd & ESP_CMD_DMA));
68
69 jazz_esp_write8(esp, (esp_count >> 0) & 0xff, ESP_TCLOW);
70 jazz_esp_write8(esp, (esp_count >> 8) & 0xff, ESP_TCMED);
71 vdma_disable ((int)esp->dma_regs);
72 if (write)
73 vdma_set_mode ((int)esp->dma_regs, DMA_MODE_READ);
74 else
75 vdma_set_mode ((int)esp->dma_regs, DMA_MODE_WRITE);
76
77 vdma_set_addr ((int)esp->dma_regs, addr);
78 vdma_set_count ((int)esp->dma_regs, dma_count);
79 vdma_enable ((int)esp->dma_regs);
80
81 scsi_esp_cmd(esp, cmd);
82 }
83
84 static int jazz_esp_dma_error(struct esp *esp)
85 {
86 u32 enable = vdma_get_enable((int)esp->dma_regs);
87
88 if (enable & (R4030_MEM_INTR|R4030_ADDR_INTR))
89 return 1;
90
91 return 0;
92 }
93
94 static const struct esp_driver_ops jazz_esp_ops = {
95 .esp_write8 = jazz_esp_write8,
96 .esp_read8 = jazz_esp_read8,
97 .irq_pending = jazz_esp_irq_pending,
98 .reset_dma = jazz_esp_reset_dma,
99 .dma_drain = jazz_esp_dma_drain,
100 .dma_invalidate = jazz_esp_dma_invalidate,
101 .send_dma_cmd = jazz_esp_send_dma_cmd,
102 .dma_error = jazz_esp_dma_error,
103 };
104
105 static int esp_jazz_probe(struct platform_device *dev)
106 {
107 struct scsi_host_template *tpnt = &scsi_esp_template;
108 struct Scsi_Host *host;
109 struct esp *esp;
110 struct resource *res;
111 int err;
112
113 host = scsi_host_alloc(tpnt, sizeof(struct esp));
114
115 err = -ENOMEM;
116 if (!host)
117 goto fail;
118
119 host->max_id = 8;
120 esp = shost_priv(host);
121
122 esp->host = host;
123 esp->dev = &dev->dev;
124 esp->ops = &jazz_esp_ops;
125
126 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
127 if (!res)
128 goto fail_unlink;
129
130 esp->regs = (void __iomem *)res->start;
131 if (!esp->regs)
132 goto fail_unlink;
133
134 res = platform_get_resource(dev, IORESOURCE_MEM, 1);
135 if (!res)
136 goto fail_unlink;
137
138 esp->dma_regs = (void __iomem *)res->start;
139
140 esp->command_block = dma_alloc_coherent(esp->dev, 16,
141 &esp->command_block_dma,
142 GFP_KERNEL);
143 if (!esp->command_block)
144 goto fail_unmap_regs;
145
146 host->irq = platform_get_irq(dev, 0);
147 err = request_irq(host->irq, scsi_esp_intr, IRQF_SHARED, "ESP", esp);
148 if (err < 0)
149 goto fail_unmap_command_block;
150
151 esp->scsi_id = 7;
152 esp->host->this_id = esp->scsi_id;
153 esp->scsi_id_mask = (1 << esp->scsi_id);
154 esp->cfreq = 40000000;
155
156 dev_set_drvdata(&dev->dev, esp);
157
158 err = scsi_esp_register(esp);
159 if (err)
160 goto fail_free_irq;
161
162 return 0;
163
164 fail_free_irq:
165 free_irq(host->irq, esp);
166 fail_unmap_command_block:
167 dma_free_coherent(esp->dev, 16,
168 esp->command_block,
169 esp->command_block_dma);
170 fail_unmap_regs:
171 fail_unlink:
172 scsi_host_put(host);
173 fail:
174 return err;
175 }
176
177 static int esp_jazz_remove(struct platform_device *dev)
178 {
179 struct esp *esp = dev_get_drvdata(&dev->dev);
180 unsigned int irq = esp->host->irq;
181
182 scsi_esp_unregister(esp);
183
184 free_irq(irq, esp);
185 dma_free_coherent(esp->dev, 16,
186 esp->command_block,
187 esp->command_block_dma);
188
189 scsi_host_put(esp->host);
190
191 return 0;
192 }
193
194
195 MODULE_ALIAS("platform:jazz_esp");
196
197 static struct platform_driver esp_jazz_driver = {
198 .probe = esp_jazz_probe,
199 .remove = esp_jazz_remove,
200 .driver = {
201 .name = "jazz_esp",
202 },
203 };
204
205 static int __init jazz_esp_init(void)
206 {
207 return platform_driver_register(&esp_jazz_driver);
208 }
209
210 static void __exit jazz_esp_exit(void)
211 {
212 platform_driver_unregister(&esp_jazz_driver);
213 }
214
215 MODULE_DESCRIPTION("JAZZ ESP SCSI driver");
216 MODULE_AUTHOR("Thomas Bogendoerfer (tsbogend@alpha.franken.de)");
217 MODULE_LICENSE("GPL");
218 MODULE_VERSION(DRV_VERSION);
219
220 module_init(jazz_esp_init);
221 module_exit(jazz_esp_exit);