On 04/03/2012 02:44 PM, Wolfgang Grandegger wrote: > On 04/03/2012 02:32 PM, AnilKumar Ch wrote: >> This patch adds the support for Bosch D_CAN controller. >> >> Bosch D_CAN controller is a full-CAN implementation compliant to >> CAN protocol version 2.0 part A and B. Bosch D_CAN user manual >> can be obtained from: http://www.semiconductors.bosch.de/media/ >> en/pdf/ipmodules_1/can/d_can_users_manual_111.pdf >> >> D_CAN device is used on many SoCs like AM335x, DM8148 and DM813x >> EVMs from TI, D_CAN details on AM335x can be accessed from: >> http://www.ti.com/lit/ug/spruh73c/spruh73c.pdf >> >> D_CAN can be configurable for 16, 32, 64 and 128 message objects. >> The driver implementation is based on 64 message objects. >> >> Following are the design choices made while writing the controller >> driver: >> 1. Interface Register set IF0 has be used for receive and IF1 is >> used for transmit message objects. >> 2. Out of the total Message objects available, half of it are kept >> aside for RX purposes and the rest for TX purposes. >> 3. NAPI implementation is such that both the TX and RX paths >> functions in polling mode. >> >> Signed-off-by: AnilKumar Ch <anilkumar@xxxxxx> > > Please explain why this CAN controller cannot be handled by the existing > C_CAN driver, eventually with some extensions. The register layout seems > almost identical, at least. ACK. Have a look at the recent at91_can driver. It has been improved to work with a flexible number of message objects. Marc -- Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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