1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux. |
4 | * Amiga Technologies A4000T SCSI controller. |
5 | * |
6 | * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk> |
7 | * plus modifications of the 53c7xx.c driver to support the Amiga. |
8 | * |
9 | * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org> |
10 | */ |
11 | |
12 | #include <linux/module.h> |
13 | #include <linux/platform_device.h> |
14 | #include <linux/init.h> |
15 | #include <linux/interrupt.h> |
16 | #include <linux/slab.h> |
17 | #include <asm/amigahw.h> |
18 | #include <asm/amigaints.h> |
19 | #include <scsi/scsi_host.h> |
20 | #include <scsi/scsi_transport_spi.h> |
21 | |
22 | #include "53c700.h" |
23 | |
24 | |
25 | static struct scsi_host_template a4000t_scsi_driver_template = { |
26 | .name = "A4000T builtin SCSI" , |
27 | .proc_name = "A4000t" , |
28 | .this_id = 7, |
29 | .module = THIS_MODULE, |
30 | }; |
31 | |
32 | |
33 | #define A4000T_SCSI_OFFSET 0x40 |
34 | |
35 | static int __init amiga_a4000t_scsi_probe(struct platform_device *pdev) |
36 | { |
37 | struct resource *res; |
38 | phys_addr_t scsi_addr; |
39 | struct NCR_700_Host_Parameters *hostdata; |
40 | struct Scsi_Host *host; |
41 | |
42 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
43 | if (!res) |
44 | return -ENODEV; |
45 | |
46 | if (!request_mem_region(res->start, resource_size(res), |
47 | "A4000T builtin SCSI" )) |
48 | return -EBUSY; |
49 | |
50 | hostdata = kzalloc(size: sizeof(struct NCR_700_Host_Parameters), |
51 | GFP_KERNEL); |
52 | if (!hostdata) { |
53 | dev_err(&pdev->dev, "Failed to allocate host data\n" ); |
54 | goto out_release; |
55 | } |
56 | |
57 | scsi_addr = res->start + A4000T_SCSI_OFFSET; |
58 | |
59 | /* Fill in the required pieces of hostdata */ |
60 | hostdata->base = ZTWO_VADDR(scsi_addr); |
61 | hostdata->clock = 50; |
62 | hostdata->chip710 = 1; |
63 | hostdata->dmode_extra = DMODE_FC2; |
64 | hostdata->dcntl_extra = EA_710; |
65 | |
66 | /* and register the chip */ |
67 | host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata, |
68 | &pdev->dev); |
69 | if (!host) { |
70 | dev_err(&pdev->dev, |
71 | "No host detected; board configuration problem?\n" ); |
72 | goto out_free; |
73 | } |
74 | |
75 | host->this_id = 7; |
76 | host->base = scsi_addr; |
77 | host->irq = IRQ_AMIGA_PORTS; |
78 | |
79 | if (request_irq(irq: host->irq, handler: NCR_700_intr, IRQF_SHARED, name: "a4000t-scsi" , |
80 | dev: host)) { |
81 | dev_err(&pdev->dev, "request_irq failed\n" ); |
82 | goto out_put_host; |
83 | } |
84 | |
85 | platform_set_drvdata(pdev, data: host); |
86 | scsi_scan_host(host); |
87 | return 0; |
88 | |
89 | out_put_host: |
90 | scsi_host_put(t: host); |
91 | out_free: |
92 | kfree(objp: hostdata); |
93 | out_release: |
94 | release_mem_region(res->start, resource_size(res)); |
95 | return -ENODEV; |
96 | } |
97 | |
98 | static void __exit amiga_a4000t_scsi_remove(struct platform_device *pdev) |
99 | { |
100 | struct Scsi_Host *host = platform_get_drvdata(pdev); |
101 | struct NCR_700_Host_Parameters *hostdata = shost_priv(shost: host); |
102 | struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
103 | |
104 | scsi_remove_host(host); |
105 | NCR_700_release(host); |
106 | kfree(objp: hostdata); |
107 | free_irq(host->irq, host); |
108 | release_mem_region(res->start, resource_size(res)); |
109 | } |
110 | |
111 | static struct platform_driver amiga_a4000t_scsi_driver = { |
112 | .remove_new = __exit_p(amiga_a4000t_scsi_remove), |
113 | .driver = { |
114 | .name = "amiga-a4000t-scsi" , |
115 | }, |
116 | }; |
117 | |
118 | module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe); |
119 | |
120 | MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / " |
121 | "Kars de Jong <jongk@linux-m68k.org>" ); |
122 | MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver" ); |
123 | MODULE_LICENSE("GPL" ); |
124 | MODULE_ALIAS("platform:amiga-a4000t-scsi" ); |
125 | |