diff options
Diffstat (limited to 'drivers/pcmcia/sa1111_lubbock.c')
| -rw-r--r-- | drivers/pcmcia/sa1111_lubbock.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/pcmcia/sa1111_lubbock.c b/drivers/pcmcia/sa1111_lubbock.c new file mode 100644 index 000000000..f1b5160cb --- /dev/null +++ b/drivers/pcmcia/sa1111_lubbock.c @@ -0,0 +1,155 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/drivers/pcmcia/pxa2xx_lubbock.c + * + * Author: George Davis + * Created: Jan 10, 2002 + * Copyright: MontaVista Software Inc. + * + * Originally based upon linux/drivers/pcmcia/sa1100_neponset.c + * + * Lubbock PCMCIA specific routines. + */ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/delay.h> + +#include <asm/hardware/sa1111.h> +#include <asm/mach-types.h> + +#include "sa1111_generic.h" +#include "max1600.h" + +static int lubbock_pcmcia_hw_init(struct soc_pcmcia_socket *skt) +{ + struct max1600 *m; + int ret; + + ret = max1600_init(skt->socket.dev.parent, &m, + skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A, + MAX1600_CODE_HIGH); + if (ret == 0) + skt->driver_data = m; + + return ret; +} + +static int +lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, + const socket_state_t *state) +{ + struct max1600 *m = skt->driver_data; + int ret = 0; + + /* Lubbock uses the Maxim MAX1602, with the following connections: + * + * Socket 0 (PCMCIA): + * MAX1602 Lubbock Register + * Pin Signal + * ----- ------- ---------------------- + * A0VPP S0_PWR0 SA-1111 GPIO A<0> + * A1VPP S0_PWR1 SA-1111 GPIO A<1> + * A0VCC S0_PWR2 SA-1111 GPIO A<2> + * A1VCC S0_PWR3 SA-1111 GPIO A<3> + * VX VCC + * VY +3.3V + * 12IN +12V + * CODE +3.3V Cirrus Code, CODE = High (VY) + * + * Socket 1 (CF): + * MAX1602 Lubbock Register + * Pin Signal + * ----- ------- ---------------------- + * A0VPP GND VPP is not connected + * A1VPP GND VPP is not connected + * A0VCC S1_PWR0 MISC_WR<14> + * A1VCC S1_PWR1 MISC_WR<15> + * VX VCC + * VY +3.3V + * 12IN GND VPP is not connected + * CODE +3.3V Cirrus Code, CODE = High (VY) + * + */ + + again: + switch (skt->nr) { + case 0: + case 1: + break; + + default: + ret = -1; + } + + if (ret == 0) + ret = sa1111_pcmcia_configure_socket(skt, state); + if (ret == 0) + ret = max1600_configure(m, state->Vcc, state->Vpp); + +#if 1 + if (ret == 0 && state->Vcc == 33) { + struct pcmcia_state new_state; + + /* + * HACK ALERT: + * We can't sense the voltage properly on Lubbock before + * actually applying some power to the socket (catch 22). + * Resense the socket Voltage Sense pins after applying + * socket power. + * + * Note: It takes about 2.5ms for the MAX1602 VCC output + * to rise. + */ + mdelay(3); + + sa1111_pcmcia_socket_state(skt, &new_state); + + if (!new_state.vs_3v && !new_state.vs_Xv) { + /* + * Switch to 5V, Configure socket with 5V voltage + */ + max1600_configure(m, 0, 0); + + /* + * It takes about 100ms to turn off Vcc. + */ + mdelay(100); + + /* + * We need to hack around the const qualifier as + * well to keep this ugly workaround localized and + * not force it to the rest of the code. Barf bags + * available in the seat pocket in front of you! + */ + ((socket_state_t *)state)->Vcc = 50; + ((socket_state_t *)state)->Vpp = 50; + goto again; + } + } +#endif + + return ret; +} + +static struct pcmcia_low_level lubbock_pcmcia_ops = { + .owner = THIS_MODULE, + .hw_init = lubbock_pcmcia_hw_init, + .configure_socket = lubbock_pcmcia_configure_socket, + .first = 0, + .nr = 2, +}; + +#include "pxa2xx_base.h" + +int pcmcia_lubbock_init(struct sa1111_dev *sadev) +{ + pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops); + pxa2xx_configure_sockets(&sadev->dev, &lubbock_pcmcia_ops); + return sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops, + pxa2xx_drv_pcmcia_add_one); +} + +MODULE_LICENSE("GPL"); |