1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | |
3 | /* PARISC LASI driver for the 53c700 chip |
4 | * |
5 | * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com |
6 | **----------------------------------------------------------------------------- |
7 | ** |
8 | ** |
9 | **----------------------------------------------------------------------------- |
10 | */ |
11 | |
12 | /* |
13 | * Many thanks to Richard Hirst <rhirst@linuxcare.com> for patiently |
14 | * debugging this driver on the parisc architecture and suggesting |
15 | * many improvements and bug fixes. |
16 | * |
17 | * Thanks also go to Linuxcare Inc. for providing several PARISC |
18 | * machines for me to debug the driver on. |
19 | */ |
20 | |
21 | #include <linux/kernel.h> |
22 | #include <linux/module.h> |
23 | #include <linux/init.h> |
24 | #include <linux/types.h> |
25 | #include <linux/stat.h> |
26 | #include <linux/mm.h> |
27 | #include <linux/blkdev.h> |
28 | #include <linux/ioport.h> |
29 | #include <linux/dma-mapping.h> |
30 | #include <linux/slab.h> |
31 | |
32 | #include <asm/page.h> |
33 | #include <asm/irq.h> |
34 | #include <asm/hardware.h> |
35 | #include <asm/parisc-device.h> |
36 | #include <asm/delay.h> |
37 | |
38 | #include <scsi/scsi_host.h> |
39 | #include <scsi/scsi_device.h> |
40 | #include <scsi/scsi_transport.h> |
41 | #include <scsi/scsi_transport_spi.h> |
42 | |
43 | #include "53c700.h" |
44 | |
45 | MODULE_AUTHOR("James Bottomley" ); |
46 | MODULE_DESCRIPTION("lasi700 SCSI Driver" ); |
47 | MODULE_LICENSE("GPL" ); |
48 | |
49 | #define LASI_700_SVERSION 0x00071 |
50 | #define LASI_710_SVERSION 0x00082 |
51 | |
52 | #define LASI700_ID_TABLE { \ |
53 | .hw_type = HPHW_FIO, \ |
54 | .sversion = LASI_700_SVERSION, \ |
55 | .hversion = HVERSION_ANY_ID, \ |
56 | .hversion_rev = HVERSION_REV_ANY_ID, \ |
57 | } |
58 | |
59 | #define LASI710_ID_TABLE { \ |
60 | .hw_type = HPHW_FIO, \ |
61 | .sversion = LASI_710_SVERSION, \ |
62 | .hversion = HVERSION_ANY_ID, \ |
63 | .hversion_rev = HVERSION_REV_ANY_ID, \ |
64 | } |
65 | |
66 | #define LASI700_CLOCK 25 |
67 | #define LASI710_CLOCK 40 |
68 | #define LASI_SCSI_CORE_OFFSET 0x100 |
69 | |
70 | static const struct parisc_device_id lasi700_ids[] __initconst = { |
71 | LASI700_ID_TABLE, |
72 | LASI710_ID_TABLE, |
73 | { 0 } |
74 | }; |
75 | |
76 | static struct scsi_host_template lasi700_template = { |
77 | .name = "LASI SCSI 53c700" , |
78 | .proc_name = "lasi700" , |
79 | .this_id = 7, |
80 | .module = THIS_MODULE, |
81 | }; |
82 | MODULE_DEVICE_TABLE(parisc, lasi700_ids); |
83 | |
84 | static int __init |
85 | lasi700_probe(struct parisc_device *dev) |
86 | { |
87 | unsigned long base = dev->hpa.start + LASI_SCSI_CORE_OFFSET; |
88 | struct NCR_700_Host_Parameters *hostdata; |
89 | struct Scsi_Host *host; |
90 | |
91 | hostdata = kzalloc(size: sizeof(*hostdata), GFP_KERNEL); |
92 | if (!hostdata) { |
93 | dev_printk(KERN_ERR, &dev->dev, "Failed to allocate host data\n" ); |
94 | return -ENOMEM; |
95 | } |
96 | |
97 | hostdata->dev = &dev->dev; |
98 | dma_set_mask(dev: &dev->dev, DMA_BIT_MASK(32)); |
99 | hostdata->base = ioremap(offset: base, size: 0x100); |
100 | hostdata->differential = 0; |
101 | |
102 | if (dev->id.sversion == LASI_700_SVERSION) { |
103 | hostdata->clock = LASI700_CLOCK; |
104 | hostdata->force_le_on_be = 1; |
105 | } else { |
106 | hostdata->clock = LASI710_CLOCK; |
107 | hostdata->force_le_on_be = 0; |
108 | hostdata->chip710 = 1; |
109 | hostdata->dmode_extra = DMODE_FC2; |
110 | hostdata->burst_length = 8; |
111 | } |
112 | |
113 | host = NCR_700_detect(&lasi700_template, hostdata, &dev->dev); |
114 | if (!host) |
115 | goto out_kfree; |
116 | host->this_id = 7; |
117 | host->base = base; |
118 | host->irq = dev->irq; |
119 | if(request_irq(irq: dev->irq, handler: NCR_700_intr, IRQF_SHARED, name: "lasi700" , dev: host)) { |
120 | printk(KERN_ERR "lasi700: request_irq failed!\n" ); |
121 | goto out_put_host; |
122 | } |
123 | |
124 | dev_set_drvdata(dev: &dev->dev, data: host); |
125 | scsi_scan_host(host); |
126 | |
127 | return 0; |
128 | |
129 | out_put_host: |
130 | scsi_host_put(t: host); |
131 | out_kfree: |
132 | iounmap(addr: hostdata->base); |
133 | kfree(objp: hostdata); |
134 | return -ENODEV; |
135 | } |
136 | |
137 | static void __exit |
138 | lasi700_driver_remove(struct parisc_device *dev) |
139 | { |
140 | struct Scsi_Host *host = dev_get_drvdata(dev: &dev->dev); |
141 | struct NCR_700_Host_Parameters *hostdata = |
142 | (struct NCR_700_Host_Parameters *)host->hostdata[0]; |
143 | |
144 | scsi_remove_host(host); |
145 | NCR_700_release(host); |
146 | free_irq(host->irq, host); |
147 | iounmap(addr: hostdata->base); |
148 | kfree(objp: hostdata); |
149 | } |
150 | |
151 | static struct parisc_driver lasi700_driver __refdata = { |
152 | .name = "lasi_scsi" , |
153 | .id_table = lasi700_ids, |
154 | .probe = lasi700_probe, |
155 | .remove = __exit_p(lasi700_driver_remove), |
156 | }; |
157 | |
158 | static int __init |
159 | lasi700_init(void) |
160 | { |
161 | return register_parisc_driver(&lasi700_driver); |
162 | } |
163 | |
164 | static void __exit |
165 | lasi700_exit(void) |
166 | { |
167 | unregister_parisc_driver(&lasi700_driver); |
168 | } |
169 | |
170 | module_init(lasi700_init); |
171 | module_exit(lasi700_exit); |
172 | |