1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
4*4882a593Smuzhiyun * Amiga Technologies A4000T SCSI controller.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
7*4882a593Smuzhiyun * plus modifications of the 53c7xx.c driver to support the Amiga.
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/module.h>
13*4882a593Smuzhiyun #include <linux/platform_device.h>
14*4882a593Smuzhiyun #include <linux/init.h>
15*4882a593Smuzhiyun #include <linux/interrupt.h>
16*4882a593Smuzhiyun #include <linux/slab.h>
17*4882a593Smuzhiyun #include <asm/amigahw.h>
18*4882a593Smuzhiyun #include <asm/amigaints.h>
19*4882a593Smuzhiyun #include <scsi/scsi_host.h>
20*4882a593Smuzhiyun #include <scsi/scsi_transport_spi.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #include "53c700.h"
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun static struct scsi_host_template a4000t_scsi_driver_template = {
26*4882a593Smuzhiyun .name = "A4000T builtin SCSI",
27*4882a593Smuzhiyun .proc_name = "A4000t",
28*4882a593Smuzhiyun .this_id = 7,
29*4882a593Smuzhiyun .module = THIS_MODULE,
30*4882a593Smuzhiyun };
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun #define A4000T_SCSI_OFFSET 0x40
34*4882a593Smuzhiyun
amiga_a4000t_scsi_probe(struct platform_device * pdev)35*4882a593Smuzhiyun static int __init amiga_a4000t_scsi_probe(struct platform_device *pdev)
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun struct resource *res;
38*4882a593Smuzhiyun phys_addr_t scsi_addr;
39*4882a593Smuzhiyun struct NCR_700_Host_Parameters *hostdata;
40*4882a593Smuzhiyun struct Scsi_Host *host;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
43*4882a593Smuzhiyun if (!res)
44*4882a593Smuzhiyun return -ENODEV;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun if (!request_mem_region(res->start, resource_size(res),
47*4882a593Smuzhiyun "A4000T builtin SCSI"))
48*4882a593Smuzhiyun return -EBUSY;
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters),
51*4882a593Smuzhiyun GFP_KERNEL);
52*4882a593Smuzhiyun if (!hostdata) {
53*4882a593Smuzhiyun dev_err(&pdev->dev, "Failed to allocate host data\n");
54*4882a593Smuzhiyun goto out_release;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun scsi_addr = res->start + A4000T_SCSI_OFFSET;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun /* Fill in the required pieces of hostdata */
60*4882a593Smuzhiyun hostdata->base = ZTWO_VADDR(scsi_addr);
61*4882a593Smuzhiyun hostdata->clock = 50;
62*4882a593Smuzhiyun hostdata->chip710 = 1;
63*4882a593Smuzhiyun hostdata->dmode_extra = DMODE_FC2;
64*4882a593Smuzhiyun hostdata->dcntl_extra = EA_710;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun /* and register the chip */
67*4882a593Smuzhiyun host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata,
68*4882a593Smuzhiyun &pdev->dev);
69*4882a593Smuzhiyun if (!host) {
70*4882a593Smuzhiyun dev_err(&pdev->dev,
71*4882a593Smuzhiyun "No host detected; board configuration problem?\n");
72*4882a593Smuzhiyun goto out_free;
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun host->this_id = 7;
76*4882a593Smuzhiyun host->base = scsi_addr;
77*4882a593Smuzhiyun host->irq = IRQ_AMIGA_PORTS;
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
80*4882a593Smuzhiyun host)) {
81*4882a593Smuzhiyun dev_err(&pdev->dev, "request_irq failed\n");
82*4882a593Smuzhiyun goto out_put_host;
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun platform_set_drvdata(pdev, host);
86*4882a593Smuzhiyun scsi_scan_host(host);
87*4882a593Smuzhiyun return 0;
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun out_put_host:
90*4882a593Smuzhiyun scsi_host_put(host);
91*4882a593Smuzhiyun out_free:
92*4882a593Smuzhiyun kfree(hostdata);
93*4882a593Smuzhiyun out_release:
94*4882a593Smuzhiyun release_mem_region(res->start, resource_size(res));
95*4882a593Smuzhiyun return -ENODEV;
96*4882a593Smuzhiyun }
97*4882a593Smuzhiyun
amiga_a4000t_scsi_remove(struct platform_device * pdev)98*4882a593Smuzhiyun static int __exit amiga_a4000t_scsi_remove(struct platform_device *pdev)
99*4882a593Smuzhiyun {
100*4882a593Smuzhiyun struct Scsi_Host *host = platform_get_drvdata(pdev);
101*4882a593Smuzhiyun struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
102*4882a593Smuzhiyun struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun scsi_remove_host(host);
105*4882a593Smuzhiyun NCR_700_release(host);
106*4882a593Smuzhiyun kfree(hostdata);
107*4882a593Smuzhiyun free_irq(host->irq, host);
108*4882a593Smuzhiyun release_mem_region(res->start, resource_size(res));
109*4882a593Smuzhiyun return 0;
110*4882a593Smuzhiyun }
111*4882a593Smuzhiyun
112*4882a593Smuzhiyun static struct platform_driver amiga_a4000t_scsi_driver = {
113*4882a593Smuzhiyun .remove = __exit_p(amiga_a4000t_scsi_remove),
114*4882a593Smuzhiyun .driver = {
115*4882a593Smuzhiyun .name = "amiga-a4000t-scsi",
116*4882a593Smuzhiyun },
117*4882a593Smuzhiyun };
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe);
120*4882a593Smuzhiyun
121*4882a593Smuzhiyun MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / "
122*4882a593Smuzhiyun "Kars de Jong <jongk@linux-m68k.org>");
123*4882a593Smuzhiyun MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
124*4882a593Smuzhiyun MODULE_LICENSE("GPL");
125*4882a593Smuzhiyun MODULE_ALIAS("platform:amiga-a4000t-scsi");
126