Hi Wei, On Mon, Mar 25, 2013 at 10:13:56AM +0800, wei_wang@xxxxxxxxxxxxxx wrote: > diff --git a/drivers/mfd/rts5249.c b/drivers/mfd/rts5249.c > new file mode 100644 > index 0000000..24a1861 > --- /dev/null > +++ b/drivers/mfd/rts5249.c > @@ -0,0 +1,245 @@ > +/* Driver for Realtek PCI-Express card reader > + * > + * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved. 2009-2013 ? > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms of the GNU General Public License as published by the > + * Free Software Foundation; either version 2, or (at your option) any > + * later version. > + * > + * This program is distributed in the hope that it will be useful, but > + * WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + * General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License along > + * with this program; if not, see <http://www.gnu.org/licenses/>. > + * > + * Author: > + * Wei WANG <wei_wang@xxxxxxxxxxxxxx> > + * No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China > + */ > + > +#include <linux/module.h> > +#include <linux/delay.h> > +#include <linux/mfd/rtsx_pci.h> > + > +#include "rtsx_pcr.h" > + > +static u8 rts5249_get_ic_version(struct rtsx_pcr *pcr) > +{ > + u8 val; > + > + rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val); > + return val & 0x0F; > +} > + > +static int rts5249_extra_init_hw(struct rtsx_pcr *pcr) > +{ > + rtsx_pci_init_cmd(pcr); > + > + /* Configure GPIO as output */ > + rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, GPIO_CTL, 0x02, 0x02); > + /* Switch LDO3318 source from DV33 to card_3v3 */ > + rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x00); > + rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x01); > + /* LED shine disabled, set initial shine cycle period */ > + rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OLT_LED_CTL, 0x0F, 0x02); > + /* Configure force_clock_req > + * Maybe We should define 0xFF03 as some name > + */ > + rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, 0xFF03, 0x08, 0x08); > + /* Correct driving */ > + rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, > + SD30_CLK_DRIVE_SEL, 0xFF, 0x99); > + rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, > + SD30_CMD_DRIVE_SEL, 0xFF, 0x99); > + rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, > + SD30_DAT_DRIVE_SEL, 0xFF, 0x92); > + > + return rtsx_pci_send_cmd(pcr, 100); > +} > + > +static int rts5249_optimize_phy(struct rtsx_pcr *pcr) > +{ > + int err; > + > + err = rtsx_pci_write_phy_register(pcr, 0x19, 0xFE46); There are a _lot_ of magic values in those drivers. Could we at least define register names in the header files ? > + if (err < 0) > + return err; > + > + mdelay(1); I second Dan here: Why do you need to busy loop ? I understand delays may be needed, but why wouldn't an msleep be sufficient ? AFAICT, you're calling this one from the PCI probe routine, where you could sleep. Cheers, Samuel. -- Intel Open Source Technology Centre http://oss.intel.com/ _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
